MESON Chess Problem Database

Problem Display
PID: 22322 (8/8/4K3/8/8/8/2QPk1B1/B3bR2 w - - 0 1)

Valuska, Jan

3rd Prize, Unikonzum, 1978

8/8/4K3/8/8/8/2QPk1B1/B3bR2

#2

6 + 2

5865 Czech Album (1976-1978) 1983
3750 FIDE Album (1977-1979) 1984

SOLUTION

  • SOUND
  • Tries
    • 1.Bc3?
      • 1...Bxd2
        • 2.Qxd2#
      • 1...Bg3
        • 2.Qe4#
      • 1...Bh4
        • 2.Qe4#
      • 1...Bf2!
    • 1.Be4?
      • threat
        • 2.Bd3#
      • 1...Bxd2
        • 2.Qd3#
      • 1...Bf2
        • 2.Qd1#
        • 2.Qd3#
      • 1...Kxf1!
    • 1.Qc3?
      • 1...Kd1
        • 2.Bf3#
      • 1...Bxd2
        • 2.Qf3#
      • 1...Bg3
        • 2.Qe3#
      • 1...Bh4
        • 2.Qe3#
      • 1...Bf2!
    • 1.d3+?
      • 1...Ke3
        • 2.Rf3#
      • 1...Bd2!
    • 1.d4+?
      • 1...Ke3
        • 2.Rf3#
      • 1...Bd2!
  • Keys
    • 1.Bd4!
      • 1...Bxd2
        • 2.Qc4#
      • 1...Bf2
        • 2.d3#
      • 1...Bg3
        • 2.d3#
      • 1...Bh4
        • 2.d3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);
      • Vars
        • B(a);OGATE,P_SPINB(a),XP(D)::QAR1(C),XB(a)
        • B(a);::QAR2(C)
      • Refutation
        • B(a);
    • Try
      • B(E);
      • Threat
        • B(E)
      • Vars
        • B(a);P_SPINB(a),XP(D)::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Vars
        • K(b);P_SPINB(a),S_FLIGHT::B(E)
        • B(a);SBLOCK,XP(D)::QAB1(C)
        • B(a);::QAR1(C)
      • Refutation
        • B(a);
    • Try
      • P(D);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(B)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • P(D);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(B)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(A);
    • Vars
      • B(a);P_SPINB(a),SBLOCK,XP(D)::QAB(C)
      • B(a);N_GUARD::QAR(C)+P(D)
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