MESON Chess Problem Database

Problem Display
PID: 241009 (8/P1pp3K/6Q1/5nPN/1Pp1kBrR/2P1p3/2N1B2p/1b6 w - - 0 1)

Hirschenson, Aaron

Variantim, 2012

8/P1pp3K/6Q1/5nPN/1Pp1kBrR/2P1p3/2N1B2p/1b6

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Bf3#
    • 1...Rg1
      • 2.Sf6#
    • 1...Rg2
      • 2.Sf6#
    • 1...Rg3
      • 2.Sf6#
    • 1...Rxg5
      • 2.Sf6#
    • 1...d5
      • 2.Qe6#
    • 1...d6
      • 2.Qe6#
  • Tries
    • 1.Sxe3?
      • threat
        • 2.Qxf5#
      • 1...Rxg5
        • 2.Sf6#
      • 1...Rxf4!
    • 1.Bxg4?
      • threat
        • 2.Qxf5#
      • 1...Kd5
        • 2.Bf3#
      • 1...Kd3!
    • 1.Bxc7?
      • threat
        • 2.Sf6#
      • 1...Kd5
        • 2.a8Q#
        • 2.a8B#
      • 1...d6
        • 2.Qe6#
      • 1...Rxh4!
    • 1.Qe8+?
      • 1...Kd5
        • 2.Bf3#
      • 1...Se7!
    • 1.Qc6+?
      • 1...d5
        • 2.Qe6#
      • 1...dxc6!
    • 1.Qf6?
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Bf3#
      • 1...d6
        • 2.Qe6#
      • 1...Rxf4!
    • 1.a8Q+?
      • 1...d5
        • 2.Qe6#
        • 2.Qae8#
      • 1...c6!
    • 1.a8B+?
      • 1...d5
        • 2.Qe6#
      • 1...c6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qxf5#
      • 1...Kd5
        • 2.Sf6#
      • 1...Rxg5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • K(e);N_SPINS(g),S_FLIGHT::B(B)
    • R(f);::S(H)
    • R(f);XP(G)::S(H)
    • P(i);N_GUARD::QAR2(I)
  • Tries
    • Try
      • S(A);XP(c)
      • Threat
        • QAB1(I),XS(g)
      • Vars
        • R(f);XP(G)::S(H)
      • Refutation
        • R(f);P_SPINR(f),XB(E)
    • Try
      • B(B);XR(f)
      • Threat
        • QAB1(I),XS(g)
      • Vars
        • K(e);N_SPINS(g),S_FLIGHT::B(B)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(E);P_PINR(f),XP(h)
      • Threat
        • S(H)
      • Vars
        • K(e);N_SPINR(f),N_SPINS(g),S_FLIGHT::P=Q
        • P(i);N_GUARD::QAR2(I)
      • Refutation
        • R(f);N_SPINR(f),P_PINS(H),XR(F)
    • Try
      • Q(I);CHECK,N_PINS(g)
      • Vars
        • K(e);S_FLIGHT::B(B)
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(I);CHECK,N_PINS(g)
      • Vars
        • P(i);N_GUARD,P_SPINP(i)::QAR2(I)
      • Refutation
        • P(i);XQ(I)
    • Try
      • Q(I);N_PINS(g)
      • Threat
        • QAR1(I)
      • Vars
        • K(e);S_FLIGHT::B(B)
        • P(i);N_GUARD::QAR2(I)
      • Refutation
        • R(f);P_SPINR(f),XB(E)
    • Try
      • P(J);CHECK
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • P(J);CHECK
      • Vars
        • P(i);P_SPINP(i)::QAR2(I)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • S(A);
    • Threat
      • QAB1(I),XS(g)
    • Vars
      • K(e);N_SPINS(g),S_FLIGHT::S(H)
      • R(f);XP(G)::S(H)
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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).