MESON Chess Problem Database

Problem Display
PID: 99480 (2Kb4/3B4/3P3B/6r1/2p2qp1/Q1p1kpNN/1R6/1n1R4 w - - 0 1)

Bakcsi, Gyorgy

Magyar Sakkszovetseg TT, 1964

2Kb4/3B4/3P3B/6r1/2p2qp1/Q1p1kpNN/1R6/1n1R4

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sf1#
    • 1...Qf7
      • 2.Qc5#
    • 1...Qf8
      • 2.Qc5#
    • 1...Ra5
      • 2.Bxf4#
    • 1...Rb5
      • 2.Bxf4#
    • 1...Rc5+
      • 2.Qxc5#
    • 1...Rd5
      • 2.Bxf4#
    • 1...Re5
      • 2.Bxf4#
    • 1...Rh5
      • 2.Bxf4#
    • 1...Rg6
      • 2.Bxf4#
      • 2.Qc5#
    • 1...Rg7
      • 2.Bxf4#
      • 2.Qc5#
    • 1...Rg8
      • 2.Bxf4#
      • 2.Qc5#
    • 1...Sd2
      • 2.Qxc3#
  • Tries
    • 1.Qc5+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Rxc5+!
    • 1.Qa7+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Rc5+
        • 2.Qxc5#
      • 1...Bb6!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Sf1#
      • 1...Qf5+
        • 2.Sxf5#
      • 1...Qxg3
        • 2.Qc5#
      • 1...Sd2
        • 2.Qxc3#
      • 1...Rd5
        • 2.Bxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(f);P_SPINR(h),SBLOCK::S(D)
    • Q(f);N_GUARD,P_SPINR(h)::QAB(C)
    • R(h);OGATE,P_SPINQ(f)::B(G),XQ(f)
    • R(h);CHECK,N_GUARD,P_SPINQ(f)::QAB(C),XR(h)
    • S(a);N_GUARD::QAR2(C),XP(b)
  • Tries
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f),P_SPINR(h)::QAB1(C),XQ(f)
      • Refutation
        • R(h);CHECK,P_SPINQ(f),XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f),P_SPINR(h)::QAB1(C),XQ(f)
        • R(h);CHECK,N_GUARD,P_SPINQ(f),P_SPINR(h)::QAB(C),XR(h)
      • Refutation
        • B(i);P_SPINB(i)
  • Actual
    • B(H);
    • Threat
      • S(D)
    • Vars
      • Q(f);CHECK,N_GUARD,P_SPINR(h)::S(D),XQ(f)
      • Q(f);N_GUARD,P_SPINR(h),XS(D)::QAB(C)
      • S(a);N_GUARD::QAR2(C),XP(b)
      • R(h);OGATE,P_SPINQ(f)::B(G),XQ(f)
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