MESON Chess Problem Database

Problem Display
PID: 157655 (1K2R3/4PB2/1p1k2pq/pP2Np2/3N1r2/P3BP2/7Q/3R4 w - - 0 1)

Murashev, Pavel Aleksandrovich

Mat Plus, 2007

1K2R3/4PB2/1p1k2pq/pP2Np2/3N1r2/P3BP2/7Q/3R4

#2

12 + 7

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qf8
      • 2.exf8Q#
      • 2.exf8B#
    • 1...Rxf3
      • 2.Sc2#
      • 2.Se2#
      • 2.Sb3#
      • 2.Sdxf3#
      • 2.Sxf5#
      • 2.Sdc6#
      • 2.Se6#
    • 1...Re4
      • 2.Sxf5#
    • 1...Rg4
      • 2.Sxf5#
    • 1...Rh4
      • 2.Sxf5#
  • Tries
    • 1.Sb3+?
      • 1...Rd4
        • 2.Rxd4#
      • 1...Kxe5!
    • 1.Se6+?
      • 1...Rd4
        • 2.Rxd4#
      • 1...Kxe5!
    • 1.Sc4+?
      • 1...Kc5
        • 2.Rc8#
      • 1...Kd7!
    • 1.Sec6?
      • threat
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sxf5#
        • 2.Se6#
      • 1...Kd7
        • 2.Rd8#
      • 1...Qxh2
        • 2.Sxf5#
      • 1...Qg7
        • 2.Sxf5#
      • 1...Qh8
        • 2.Sxf5#
      • 1...Kc5!
    • 1.Sxg6?
      • threat
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sxf5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Kd7
        • 2.Rd8#
      • 1...Qxh2
        • 2.Sxf5#
      • 1...Qxg6
        • 2.Sc6#
      • 1...Qg7
        • 2.Sxf5#
      • 1...Qh8
        • 2.Sxf5#
      • 1...Kc5!
    • 1.Sd7?
      • threat
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sxf5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Qxh2
        • 2.Sxf5#
      • 1...Qg7
        • 2.Sxf5#
      • 1...Qh8
        • 2.Sxf5#
      • 1...Kxd7!
    • 1.Qxf4?
      • threat
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sxf5#
        • 2.Sdc6#
        • 2.Se6#
      • 1...Kc5
        • 2.Sd3#
        • 2.Sd7#
      • 1...Qh1
        • 2.Sxf5#
      • 1...Qh2
        • 2.Se2#
        • 2.Sxf5#
      • 1...Qxf4!
    • 1.Qa2?
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Qd5#
      • 1...Kxe5
        • 2.Qe6#
      • 1...Rxd4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Sxf5#
      • 1...Kc5
        • 2.Se6#
      • 1...Kxe5
        • 2.Sc6#
      • 1...Rxd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(g);OGATE,P_PINR(L)::PXQ(g)=Q
    • R(a);::R(A)+S(F),DCHECK,XP(c)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R(A),XR(a)
      • Refutation
        • K(e);P_SPINR(a),S_FLIGHT,XS(H)
    • Try
      • S(F);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R(A),XR(a)
      • Refutation
        • K(e);P_SPINR(a),S_FLIGHT,XS(H)
    • Try
      • S(H);CHECK,P_PINR(a)
      • Vars
        • K(e);N_SPINR(a),S_FLIGHT::R(L)
      • Refutation
        • K(e);N_SPINR(a),P-FLIGHT
    • Try
      • S(H);P_PINR(a)
      • Threat
        • DUALS(5)
      • Vars
        • K(e);N_SPINR(a),P-FLIGHT::R1(L)
        • Q(g);N_SPINR(a),XQ(B)::R(A)+S(F),DCHECK,XP(c)
        • Q(g);::R(A)+S(F),DCHECK,XP(c)
        • Q(g);P_PINR(L)::R(A)+S(F),DCHECK,XP(c)
      • Refutation
        • K(e);N_SPINR(a),S_FLIGHT
    • Try
      • S(H);P_PINR(a),XP(f)
      • Threat
        • DUALS(6)
      • Vars
        • K(e);N_SPINR(a),P-FLIGHT::R1(L)
        • Q(g);N_SPINR(a),XQ(B)::R(A)+S(F),DCHECK,XP(c)
        • Q(g);XS(H)::R(A)+S(F)
        • Q(g);::R(A)+S(F),DCHECK,XP(c)
        • Q(g);P_PINR(L)::R(A)+S(F),DCHECK,XP(c)
      • Refutation
        • K(e);N_SPINR(a),S_FLIGHT
    • Try
      • S(H);P_PINR(a)
      • Threat
        • DUALS(6)
      • Vars
        • Q(g);N_SPINR(a),XQ(B)::R(A)+S(F),DCHECK,XP(c)
        • Q(g);::R(A)+S(F),DCHECK,XP(c)
        • Q(g);P_PINR(L)::R(A)+S(F),DCHECK,XP(c)
      • Refutation
        • K(e);N_SPINR(a),P-FLIGHT,XS(H)
    • Try
      • Q(B);XR(a)
      • Threat
        • DUALS(6)
      • Vars
        • Q(g);::R(A)+S(F),DCHECK,XP(c)
      • Refutation
        • Q(g);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(e);S_FLIGHT::QAR1(B)
        • K(e);S_FLIGHT,XS(H)::QAR1(B)
      • Refutation
        • R(a);P_SPINR(a),XS(F)
  • Actual
    • Q(B);
    • Threat
      • R(A)+S(F),DCHECK,XP(c)
    • Vars
      • K(e);S_FLIGHT::B(D)+S(F),DCHECK
      • K(e);S_FLIGHT,XS(H)::QAB(B)+S(F),DCHECK
      • R(a);OGATE,P_SPINR(a),XS(F)::QAR2(B),XR(a)
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Developed and maintained by Brian Stephenson.
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