MESON Chess Problem Database

Problem Display
PID: 97464 (3B4/7K/2pQP3/1RN2k2/3p2bp/4b1p1/5N2/1q3R2 w - - 0 1)

Bakcsi, Gyorgy

US Problem Bulletin, 1992

3B4/7K/2pQP3/1RN2k2/3p2bp/4b1p1/5N2/1q3R2

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sfd3+?
      • 1...Qxf1
        • 2.Qe5#
        • 2.Qf8#
      • 1...Bf2
        • 2.Qf4#
        • 2.Qe5#
        • 2.Qf8#
      • 1...Bf4
        • 2.Rxf4#
        • 2.Qxf4#
        • 2.Qe5#
        • 2.Qf8#
      • 1...Bf3!
    • 1.Sb3+?
      • 1...c5
        • 2.Rxc5#
      • 1...cxb5!
    • 1.Scd3+?
      • 1...cxb5
        • 2.Qe5#
        • 2.Qd5#
      • 1...c5
        • 2.Rxc5#
        • 2.Qe5#
        • 2.Qd5#
      • 1...Qxb5!
    • 1.Sd7+?
      • 1...cxb5
        • 2.Qe5#
      • 1...c5
        • 2.Rxc5#
        • 2.Qe5#
      • 1...Qxb5!
    • 1.Bc7?
      • threat
        • 2.Qe5#
      • 1...Kg5+
        • 2.Sce4#
      • 1...Kf6+
        • 2.Sfe4#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Qe4!
    • 1.Qf4+?
      • 1...Kxf4+
        • 2.Sfd3#
      • 1...Bxf4!
    • 1.Qd5+?
      • 1...Kf4+
        • 2.Sfd3#
      • 1...cxd5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qf6#
      • 1...Kf4+
        • 2.Sfd3#
      • 1...Ke5+
        • 2.Scd3#
      • 1...Bg5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • S(D);CHECK
      • Vars
        • P(h);P_SPINP(h)::R(C),XP(h)
      • Refutation
        • P(h);XR(C)
    • Try
      • S(D);CHECK
      • Refutation
        • Q(a);XR(C)
    • Try
      • S(D);CHECK
      • Vars
        • P(h);XR(C)::QAR1(E)
      • Refutation
        • Q(a);XR(C)
    • Try
      • B(H);
      • Threat
        • QAR1(E)
      • Vars
        • K(g);CHECK,P-FLIGHT::R(C)+S(D),DCHECK
        • K(g);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
        • B(b);N_GUARD::QAR1(E),XB(b)
      • Refutation
        • Q(a);
    • Try
      • Q(E);CHECK
      • Vars
        • K(g);CHECK,P-FLIGHT,XQ(E)::R(A)+S(B),DCHECK
      • Refutation
        • B(b);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(g);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
      • Refutation
        • P(h);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(g);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
      • K(g);CHECK,P-FLIGHT::R(C)+S(D),DCHECK
      • B(b);N_GUARD::QAR1(E),XB(b)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).