MESON Chess Problem Database

Problem Display
PID: 11761 (Bb4r1/1R5b/4Q3/2p2N2/3P1k1P/r7/p5PN/K7 w - - 0 1)

Casa, Alex

1/2 Prize, Sinfonie Scacchistiche, 1971

Bb4r1/1R5b/4Q3/2p2N2/3P1k1P/r7/p5PN/K7

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qxe5#
    • 1...Ba7
      • 2.Qe5#
  • Tries
    • 1.Rf7?
      • threat
        • 2.Qe4#
      • 1...Rxa8
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#
      • 1...Re8
        • 2.Qh6#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bxf5!
    • 1.Rg7?
      • threat
        • 2.Qe4#
      • 1...Rxa8
        • 2.g3#
      • 1...Bxf5
        • 2.Qh6#
      • 1...Re8
        • 2.Rg4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Re3!
  • Keys
    • 1.Rb3!
      • threat
        • 2.Qe4#
      • 1...Rxa8
        • 2.Rf3#
      • 1...Bxf5
        • 2.Qe3#
      • 1...Re8
        • 2.g3#
      • 1...Be5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(f);N_GUARD,P_PINP(D)::QAB1(G),XB(f)
    • B(f);N_GUARD::QAB1(G)
  • Tries
    • Try
      • R(H);
      • Threat
        • QAR1(G)
      • Vars
        • R(b);N_GUARD,XB(I)::QAB1(G)
        • R(b);N_GUARD::QAB1(G),XR(b)
        • R(g);N_GUARD::QAB(G)
        • B(f);N_GUARD,P_PINP(D)::QAB1(G),XB(f)
      • Refutation
        • B(e);P_SPINB(e),XS(F)
    • Try
      • R(H);
      • Threat
        • QAR1(G)
      • Vars
        • R(b);N_GUARD,XB(I)::P(B)
        • B(e);SBLOCK,XS(F)::QAB(G)
        • R(g);N_GUARD::R1(H)
        • B(f);N_GUARD,P_PINP(D)::QAB1(G),XB(f)
      • Refutation
        • R(b);
  • Actual
    • R(H);
    • Threat
      • QAR1(G)
    • Vars
      • R(b);N_GUARD,XB(I)::R1(H)
      • B(e);SBLOCK,XS(F)::QAB1(G)
      • R(g);N_GUARD::P(B)
      • B(f);N_GUARD,P_PINP(D)::QAB1(G),XB(f)
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Developed and maintained by Brian Stephenson.
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