MESON Chess Problem Database

Problem Display
PID: 109401 (1R6/8/K1p3p1/n1k5/n1PR4/P7/5Q2/b7 w - - 0 1)

Skubak, Jan

Boletim da UBP, 1992

1R6/8/K1p3p1/n1k5/n1PR4/P7/5Q2/b7

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rd1+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxc4!
    • 1.Rd2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxc4!
    • 1.Rd3+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxc4!
    • 1.Re4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Rf4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Rg4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Rh4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Rd7+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxc4!
    • 1.Rdd8+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kxc4!
    • 1.Rbd8?
      • threat
        • 2.Qf8#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Sxc4
        • 2.R4d5#
      • 1...Sb7!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Rd5#
      • 1...Bxd4
        • 2.Qf8#
      • 1...Sxc4
        • 2.Rbxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • R(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • R(F);
      • Threat
        • QAB(A)
      • Vars
        • B(a);OGATE,P_SPINB(a),XR(D)::QAB1(A),XB(a)
        • S(c);SBLOCK,XP(C)::QAB(A)+R(D),DCHECK
      • Refutation
        • S(c);
  • Actual
    • R(F);
    • Threat
      • QAB(A)+R(D),DCHECK
    • Vars
      • B(a);P_SPINB(a),SBLOCK,XR(D)::QAB(A)
      • S(c);OGATE,XP(C)::R1(F),XS(c)
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