## Thursday, June 02, 2016

### Proposal for a Theme Pergialis

We propose today a new theme, which will have the name of the Greek composer Nikos Pergialis.

Theme Pergialis : The wQ pins a piece, which is the only pinned black piece, and the threat is a pin-mate from another white piece. In the variations the wQ delivers at least four mates from different directions to the immobile bK, the one mate being by capturing the pinned piece.

### Nikos Pergialis

 Problem-818 Pergialis Nikos (GRE) Source: https://www.facebook.com/photo.php?fbid=494095627452037&set=a.146384942223109.1073741827.100005548114972&type=3 2Qq4/1Sp1br2/8/1p1p4/2k2S2/2P5/P1K1RR2/2s5 (8 + 8) #2 Key : 1.Qe6! [2.Re4#] 1…Sxe2 2.Qxe2# 1…Qh8 2.Qxd5# 1…Bf6 2.Qc6# 1…b4 2.Qa6# 1…Sb3 2.axb3# 1…Bc5 2.Sa5# 1…Rxf4 2.Rxf4# Theme Pergialis. Direct pin. Pin mates (2.Re4#, 2.Rxf4#). Four mates by the wQ. Black correction (Be7-c5 corrects Be7-f6).

 Problem-819 Pergialis Nikos (GRE) 8/S1s4q/7p/KSkr2bR/3pPQ2/3PP3/8/8 (8 + 7) #2 Key : 1.Qe5! [2.exd4#] 1…Sxb5 / Se6 2.Qxd5# 1…Bxe3 2.Qd6# 1…Qxe4 2.Qxc7# 1…dxe3 2.Qc3# Theme Pergialis. Direct Pin. Pin mate (2.exd4#). Four mates by the wQ. Reciprocal captures (dxe3, exd4).

 Problem-820 Pergialis Nikos (GRE) 7q/s1b5/S7/1S6/K1kp1s2/R7/8/7Q (5 + 6) #2 Key : 1.Qe4! [2.Rc3#] 1…Qh3 2.Qxd4# 1…Sd5 2.Qd3# 1…Se2 2.Qe6# 1…Sxb5 2.Qc6# 1…Ba5 2.Sd6# Theme Pergialis. Direct Pin. Pin mate (2.Rc3#). Four mates by the wQ. Black correction (1...Sd5 corrects 1...Se2).

 Problem-821 Pergialis Nikos (GRE) 4r3/6Qp/5B2/p2p4/Ks2kSP1/4Pp2/5P2/2R4r (8 + 8) #2 Key : 1.Qb7! [2.Rc4#] 1…Sc2 2.Qxd5# 1…Sc6 2.Qb1# 1…Rxc1 / Rd1 2.Qxh7# 1…Rc8 2.Qe7# Theme Pergialis.  Direct pin.  Pin mate.  Four mates by the wQ.  Anti-Dual Sc2 and Sc6.

 Problem-822 Pergialis Nikos (GRE) 6SQ/6p1/8/2BPkp2/qS1R4/pRp4b/Ps1p2rb/KB6 (10 + 11) #2 Key : 1.Qh5! [2.Re4#] 1…Sd3 2.Sxd3# 1…c2 2.Re3# 1…Re2 / Rg5 2.Q(x)e2# 1…Rg4 2.Qxf5# 1…g5 2.Qh8# 1…Qxb4 2.Qe8# Theme Pergialis. Direct pin. Pin mate (2.Re4). Four mates by the wQ. Black correction (1...Rg4 corrects 1...Re2 / Rg5).