MESON Chess Problem Database

Problem Display
PID: 101957 (2B5/3r4/3PP3/3rkppQ/R2bN3/8/K7/2B2R2 w - - 0 1)

Alkaff, Muchsin

Tan Hien Yan

Boletim da UBP, 1962

2B5/3r4/3PP3/3rkppQ/R2bN3/8/K7/2B2R2

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qe2#
    • 1...Kxe6
      • 2.Qe8#
    • 1...g4
      • 2.Qxf5#
  • Tries
    • 1.Bf4+?
      • 1...Kxe4
        • 2.Qe2#
        • 2.Qf3#
      • 1...Kxe6
        • 2.Qe8#
      • 1...gxf4!
    • 1.Rxf5+?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Kxf5!
  • Keys
    • 1.Qxg5!
      • threat
        • 2.Qxf5#
      • 1...Kxe4
        • 2.Qe3#
      • 1...Kxe6
        • 2.Qe7#
      • 1...Rf7
        • 2.Qf4#
      • 1...Bf2
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,P-FLIGHT,P_SPINB(a),XS(E)::QAR2(F)
    • K(c);OGATEB,P-FLIGHT,P_SPINR(f),XP(H)::QAR2(F)
    • P(e);OGATE,P_SPINP(d)::QAR1(F),XP(d)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINR(f),XP(H)::QAR2(F)
      • Refutation
        • P(e);P_SPINP(d),XB(A)
    • Try
      • R(B);CHECK,XP(d)
      • Vars
        • K(c);P-FLIGHT,P_SPINB(a),XS(E)::QAB1(F)
        • K(c);P-FLIGHT,P_SPINR(f),XP(H)::QAB1(F)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(e),XR(B)
  • Actual
    • Q(F);P_PINP(d),XP(e)
    • Threat
      • QAR1(F),XP(d)
    • Vars
      • K(c);N_SPINP(d),OGATEB,P-FLIGHT,P_SPINB(a),XS(E)::QAR1(F)
      • K(c);N_SPINP(d),OGATEB,P-FLIGHT,P_SPINR(f),XP(H)::QAR1(F)
      • R(f);::QAB1(F)
      • B(a);::QAB1(F)
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