MESON Chess Problem Database

Problem Display
PID: 258750 (7q/2rRN1np/p1p4K/1PPrPp2/1P1k1P2/NR1p1p2/nP6/2B1Q1b1 w - - 0 1)

Labai, Zoltan

1st Prize, SuperProblem 260. TT, 2021

(First published on Thu Aug 26 2021)

7q/2rRN1np/p1p4K/1PPrPp2/1P1k1P2/NR1p1p2/nP6/2B1Q1b1

#2

13 + 13

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6+
      • 2.Rxd6#
    • 1...Ra7
      • 2.Sxc6#
    • 1...Rb7
      • 2.Sxc6#
    • 1...Rxd7
      • 2.Sxc6#
    • 1...Bh2
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
    • 1...Sc3
      • 2.bxc3#
    • 1...Sxb4
      • 2.Qxb4#
    • 1...Sh5
      • 2.Sxf5#
    • 1...Se6
      • 2.Sxf5#
    • 1...Se8
      • 2.Sxf5#
    • 1...f2
      • 2.Qe3#
    • 1...cxb5
      • 2.Rxd5#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Rc4#
      • 1...Rd6+
        • 2.Rxd6#
      • 1...Sxc3
        • 2.bxc3#
      • 1...cxb5
        • 2.Rxd5#
      • 1...d2
        • 2.Sc2#
      • 1...axb5!
    • 1.Qxg1+?
      • 1...Ke4
        • 2.Qe3#
      • 1...f2!
  • Keys
    • 1.e6!
      • threat
        • 2.Qe5#
      • 1...Rcxd7
        • 2.Sxc6#
      • 1...Sxb4
        • 2.Qxb4#
      • 1...Sxe6
        • 2.Sxf5#
      • 1...Be3
        • 2.Qxe3#
      • 1...Sh5
        • 2.Sxf5#
      • 1...Se8
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(f);CHECK,OGATEB::R(L),XR(f)
    • R(j);N_GUARD::S(M),XP(i)
    • R(j);N_GUARD,N_SPINR(f),XR(L)::S(M),XP(i)
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD,P_PINP(G)::QAB1(B),XB(a)
    • S(b);OGATE::P(C),XS(b)
    • S(b);OGATE,XP(F)::QAR2(B),XS(b)
    • S(k);N_GUARD::S(M),XP(g)
    • P(d);S_CUTB(a)::QAB1(B)
    • P(i);N_GUARD,XP(H)::R1(L),XR(f)
  • Tries
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • R(f);CHECK,OGATEB::R(L),XR(f)
        • S(b);OGATE,XR(E)::P(C),XS(b)
        • P(i);N_GUARD,XP(H)::R1(L),XR(f)
        • P(c);N_GUARD::S(D)
      • Refutation
        • P(h);XP(H)
    • Try
      • Q(B);CHECK,XB(a)
      • Vars
        • K(e);N_SPINR(f),P-FLIGHT::QAR1(B)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • P(J);
    • Threat
      • QAB1(B)
    • Vars
      • R(j);N_GUARD,N_SPINR(f),XR(L)::S(M),XP(i)
      • S(b);OGATE,XP(F)::QAR2(B),XS(b)
      • S(k);N_GUARD,XP(J)::S(M),XP(g)
      • B(a);N_GUARD,P_PINP(G)::QAB1(B),XB(a)
      • S(k);N_GUARD::S(M),XP(g)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).