MESON Chess Problem Database

Problem Display
PID: 276208 (1b3N2/4p1p1/1P2R2n/2Bk1n1Q/1KN2rp1/3P1p2/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Pat a Mat, 2004

1b3N2/4p1p1/1P2R2n/2Bk1n1Q/1KN2rp1/3P1p2/8/8

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4+
      • 2.dxc4#
    • 1...Re4
      • 2.dxe4#
  • Tries
    • 1.Kb5?
      • threat
        • 2.Se3#
      • 1...Rxc4
        • 2.dxc4#
      • 1...Re4
        • 2.dxe4#
      • 1...Be5
        • 2.Rxe5#
      • 1...g5!
    • 1.Qf7?
      • threat
        • 2.Rd6#
      • 1...Rxc4+
        • 2.dxc4#
      • 1...Bd6
        • 2.Rxd6#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sxf7!
    • 1.Qxf5+?
      • 1...Rxf5
        • 2.Se3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sxf5!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qc6#
      • 1...Rxc4+
        • 2.dxc4#
      • 1...Bd6
        • 2.Qa8#
      • 1...Sd4
        • 2.Se3#
      • 1...Sd6
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);CHECK,OGATE,XS(C)::P(A),XR(b)
    • R(b);OGATE::P(A),XR(b)
  • Tries
    • Try
      • K(B);N_SPINS(C),P-FLIGHT
      • Threat
        • S(C)
      • Vars
        • R(b);OGATE,XS(C)::P(A),XR(b)
        • R(b);OGATE::P(A),XR(b)
        • B(i);N_GUARD,N_SPINS(e)::R1(G),XB(i)
      • Refutation
        • P(h);N_SPINS(e)
    • Try
      • Q(E);N_PINS(e)
      • Threat
        • QAB(E)+R(G),DCHECK
      • Vars
        • R(b);CHECK,OGATE,XS(C)::P(A),XR(b)
        • B(i);P_PINB(D)::QAB(E)+R(G),DCHECK,XB(i)
        • S(e);::QAB(E)+R(G),DCHECK,XS(e)
      • Refutation
        • S(f);XQ(E)
    • Try
      • Q(E);CHECK,XS(e)
      • Vars
        • R(b);N_PINS(C),XQ(E)::S(C)
        • B(i);N_GUARD,P_SPINB(i)::QAR1(E),XB(i)
      • Refutation
        • S(f);XQ(E)
  • Actual
    • Q(E);N_PINS(e)
    • Threat
      • QAB1(E)
    • Vars
      • R(b);CHECK,OGATE,XS(C)::P(A),XR(b)
      • B(i);OGATE,P_PINB(D)::QAB(E)
      • S(e);N_PINS(C)::S(C)
      • S(e);S_CUTB(i)::R1(G)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).