MESON Chess Problem Database

Problem Display
PID: 275575 (Q7/8/8/1K6/3p4/2Bk4/2R3P1/8 w - - 0 1)

Stepanyan, Vladimir

Buletin Problemistic, 1983

Q7/8/8/1K6/3p4/2Bk4/2R3P1/8

#2

5 + 2

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qf3#
  • Tries
    • 1.Ba1?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxc2!
    • 1.Be1?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxc2!
    • 1.Bb2?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxc2!
    • 1.Bd2?
      • 1...Ke2
        • 2.Qf3#
      • 1...Kxc2!
    • 1.Bb4?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxc2!
    • 1.Ba5?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxc2!
    • 1.Rc1?
      • threat
        • 2.Qf3#
      • 1...Ke2
        • 2.Qf3#
      • 1...Ke3
        • 2.Qf3#
      • 1...dxc3!
    • 1.Ra2?
      • threat
        • 2.Qf3#
      • 1...Kxc3
        • 2.Qa3#
      • 1...Ke3
        • 2.Qf3#
      • 1...dxc3!
    • 1.Rb2?
      • threat
        • 2.Qf3#
      • 1...Kxc3
        • 2.Qa3#
      • 1...Ke3
        • 2.Qf3#
      • 1...dxc3!
    • 1.Rd2+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxc3!
    • 1.Rf2?
      • threat
        • 2.Qf3#
      • 1...Kxc3
        • 2.Qa3#
      • 1...Ke3
        • 2.Qf3#
      • 1...dxc3!
    • 1.Qd5?
      • 1...Ke3
        • 2.Qf3#
        • 2.Qxd4#
      • 1...Kxc2!
  • Keys
    • 1.Re2!
      • threat
        • 2.Qf3#
      • 1...Kxe2
        • 2.Qf3#
      • 1...Kxc3
        • 2.Qa3#
      • 1...dxc3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);N_GUARD,P-FLIGHT::QAR1(E)
  • Tries
    • Try
      • B(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • B(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • B(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • B(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • B(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • B(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • R(A);
      • Threat
        • QAR2(E)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);XB(C)
    • Try
      • R(A);
      • Threat
        • QAR2(E)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(C)::QAR2(E)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);XB(C)
    • Try
      • R(A);
      • Threat
        • QAR2(E)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(C)::QAR2(E)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);XB(C)
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • R(A);
      • Threat
        • QAR2(E)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(C)::QAR2(E)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);XB(C)
    • Try
      • Q(E);P_PINP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XR(A)
  • Actual
    • R(A);
    • Threat
      • QAR2(E)
    • Vars
      • K(a);S_FLIGHT,XR(A)::QAB1(E)
      • K(a);OGATEB,P-FLIGHT,XB(C)::QAR2(E)
      • P(b);SBLOCK,XB(C)::QAB1(E)
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