MESON Chess Problem Database

Problem Display
PID: 135062 (1n6/3N2p1/pBp1p3/r1n1P2P/pRbk2NQ/5pPr/1P5p/3KR3 w - - 0 1)

Petite, Efren

Probleemblad, 2009

1n6/3N2p1/pBp1p3/r1n1P2P/pRbk2NQ/5pPr/1P5p/3KR3

#2

11 + 13

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sf2#
    • 1...Kd5
      • 2.Se3#
  • Tries
    • 1.Sf2+?
      • 1...Kd5
        • 2.Qxc4#
      • 1...Rxh4!
    • 1.Sxh2+?
      • 1...Kd3
        • 2.Qxc4#
      • 1...Kd5
        • 2.Qxc4#
      • 1...Rxh4!
    • 1.Se3+?
      • 1...Kd3
        • 2.Qxc4#
      • 1...Rxh4!
    • 1.Sgf6+?
      • 1...Kd3
        • 2.Qxc4#
      • 1...Rxh4!
    • 1.Sh6+?
      • 1...Kd3
        • 2.Qxc4#
      • 1...Kd5
        • 2.Qxc4#
      • 1...Rxh4!
    • 1.Bxc5+?
      • 1...Kd3
        • 2.Sf2#
        • 2.Re3#
      • 1...Kd5
        • 2.Se3#
      • 1...Rxc5!
    • 1.Re4+?
      • 1...Kd3
        • 2.Sf2#
      • 1...Kd5
        • 2.Se3#
      • 1...Kxe4!
    • 1.Rxc4+?
      • 1...Kd3
        • 2.Sf2#
      • 1...Kd5
        • 2.Se3#
      • 1...Kxc4!
    • 1.Qg5?
      • threat
        • 2.Qd2#
      • 1...Kd3
        • 2.Qd2#
        • 2.Qe3#
      • 1...Kd5!
    • 1.Qe7?
      • threat
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd3!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Sxb8#
      • 1...Kd3
        • 2.Sxc5#
      • 1...Kd5
        • 2.Sdf6#
      • 1...Sxd7
        • 2.Qxd7#

Anticipated by 58187(2001)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);N_SPINB(e),N_SPINS(h),P-FLIGHT::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);N_SPINB(e),N_SPINS(h),OGATE,P-FLIGHT::QAB1(G),XB(e)
      • Refutation
        • R(c);XQ(G)
    • Try
      • S(F);CHECK,XP(a)
      • Vars
        • K(f);N_SPINB(e),N_SPINS(h),OGATE,P-FLIGHT::QAB1(G),XB(e)
      • Refutation
        • R(c);XQ(G)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);N_SPINB(e),N_SPINS(h),OGATE,P-FLIGHT::QAB1(G),XB(e)
      • Refutation
        • R(c);XQ(G)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);N_SPINB(e),N_SPINS(h),OGATE,P-FLIGHT::QAB1(G),XB(e)
      • Refutation
        • R(c);XQ(G)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);N_SPINB(e),N_SPINS(h),OGATE,P-FLIGHT::QAB1(G),XB(e)
      • Refutation
        • R(c);XQ(G)
    • Try
      • B(J);CHECK,XS(h)
      • Vars
        • K(f);N_SPINB(e),P-FLIGHT::S(F)
      • Refutation
        • R(g);XB(J)
    • Try
      • R(B);CHECK
      • Vars
        • K(f);N_SPINB(e),N_SPINS(h),P-FLIGHT::S(F)
      • Refutation
        • K(f);N_SPINS(h),P-FLIGHT,XR(B)
    • Try
      • R(E);CHECK,XB(e)
      • Vars
        • K(f);N_SPINS(h),P-FLIGHT::S(F)
      • Refutation
        • K(f);N_SPINS(h),P-FLIGHT,XR(E)
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Refutation
        • K(f);N_SPINB(e),N_SPINS(h),P-FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • K(f);N_SPINB(e),N_SPINS(h),P-FLIGHT::QAR1(G)
      • Refutation
        • K(f);N_SPINB(e),N_SPINS(h),P-FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+S(K),XS(m)
    • Vars
      • K(f);N_SPINB(e),N_SPINS(h),P-FLIGHT::QAR(G)+S(K),DCHECK,XS(h)
      • K(f);N_SPINB(e),N_SPINS(h),P-FLIGHT::QAR(G)+S(K),DCHECK
      • S(m);OGATE,XS(K)::QAR(G),XS(m)
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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).