MESON Chess Problem Database

Problem Display
PID: 263455 (1Rb5/p2pK3/k3P1BR/p7/P1r5/n7/8/7Q w - - 0 1)

Hirschenson, Aaron

Zadachi i Etyudi, 2009

1Rb5/p2pK3/k3P1BR/p7/P1r5/n7/8/7Q

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bb7
      • 2.Qxb7#
    • 1...Sb5
      • 2.axb5#
  • Tries
    • 1.Bd3?
      • threat
        • 2.exd7#
      • 1...dxe6
        • 2.Qc6#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Sb5
        • 2.axb5#
      • 1...d6
        • 2.Qc6#
      • 1...d5!
    • 1.Rb6+?
      • 1...axb6
        • 2.Qa8#
      • 1...Kxb6!
  • Keys
    • 1.exd7!
      • threat
        • 2.Bd3#
      • 1...Re4+
        • 2.Bxe4#
      • 1...Bxd7
        • 2.Qb7#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Sb5
        • 2.axb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(g);N_GUARD::QAB1(A),XB(g)
    • S(a);OGATE::P(B),XS(a)
  • Tries
    • Try
      • B(D);P_PINR(b)
      • Threat
        • R(E)+P(C),XP(f)
      • Vars
        • P(f);N_GUARD,P_SPINP(f),XP(C)::QAR2(A)
        • B(g);N_GUARD::QAB1(A),XB(g)
        • S(a);N_SPINR(b),OGATE::P(B),XS(a)
        • P(f);N_GUARD::QAR2(A)
      • Refutation
        • P(f);
    • Try
      • R(G);CHECK
      • Vars
        • P(e);SBLOCK,XR(G)::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT,XR(G)
  • Actual
    • P(C);XP(f)
    • Threat
      • R(E)+B(D)
    • Vars
      • R(b);CHECK,N_GUARD::R(E)+B(D),XR(b)
      • B(g);N_GUARD,XP(C)::QAB1(A)
      • B(g);N_GUARD::QAB1(A),XB(g)
      • R(b);N_GUARD::QAR2(A),XR(b)
      • S(a);OGATE::P(B),XS(a)
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