MESON Chess Problem Database

Problem Display
PID: 168321 (B3K2B/6N1/2p2Rp1/R1N1k3/6P1/1QpP4/2Pn4/1n2r3 w - - 0 1)

Petite, Efren

The Problemist, 1994

B3K2B/6N1/2p2Rp1/R1N1k3/6P1/1QpP4/2Pn4/1n2r3

#2

11 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6+
      • 2.Sge6#
  • Tries
    • 1.Se4+?
      • 1...c5
        • 2.Qd5#
      • 1...Kd4!
    • 1.Sce6+?
      • 1...Kd6
        • 2.Qb8#
      • 1...Kxf6
        • 2.Sf5#
        • 2.Sh5#
        • 2.g5#
      • 1...c5!
    • 1.Re6+?
      • 1...Kd4
        • 2.Sf5#
      • 1...Kf4!
    • 1.Qa4?
      • threat
        • 2.Sd7#
      • 1...Kd5+
        • 2.Se4#
      • 1...Kxf6+
        • 2.Sge6#
      • 1...Sc4!
    • 1.Qc4?
      • threat
        • 2.Sd7#
        • 2.Re6#
      • 1...Kxf6+
        • 2.Sge6#
      • 1...Re4
        • 2.Sd7#
      • 1...Se4
        • 2.Sd7#
      • 1...Sxc4!
    • 1.Qxc3+?
      • 1...Kd5+
        • 2.Se4#
      • 1...Sxc3!
    • 1.Qb4?
      • threat
        • 2.Sd7#
      • 1...Kd5+
        • 2.Se4#
        • 2.Sce6#
      • 1...Kxf6+
        • 2.Sge6#
      • 1...Sc4!
    • 1.Qb8+?
      • 1...Kd5+
        • 2.Sce6#
      • 1...Kxf6+
        • 2.Sge6#
      • 1...Kd4+!
    • 1.d4+?
      • 1...Kxf6+
        • 2.Sge6#
      • 1...Kxd4+!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Sd7#
      • 1...Kd4+
        • 2.Sce6#
      • 1...Kd5+
        • 2.Se4#
      • 1...Kxf6+
        • 2.Sge6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);CHECK,S_FLIGHT,XR(G)::B(K)+S(H)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • P(f);N_GUARD,P_SPINP(f)::QAR1(B)
      • Refutation
        • K(e);P_PINS(F),S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(e);P_PINS(F),S_FLIGHT::QAB(B)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • R(G);CHECK
      • Vars
        • K(e);P_PINR(G),S_FLIGHT::B(K)+S(H),DCHECK
      • Refutation
        • K(e);P_PINR(G),S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • R(E)+S(F),DCHECK
      • Vars
        • K(e);CHECK,P-FLIGHT,P_SPINP(f)::R(E)+S(F)
        • K(e);CHECK,S_FLIGHT,XR(G)::B(K)+S(H)
      • Refutation
        • S(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);CHECK,S_FLIGHT,XR(G)::B(K)+S(H)
        • R(b);::R(E)+S(F),DCHECK
        • S(c);::R(E)+S(F),DCHECK
      • Refutation
        • S(c);XQ(B)
    • Try
      • Q(B);CHECK,XP(d)
      • Vars
        • K(e);CHECK,P-FLIGHT,P_SPINP(f)::R(E)+S(F)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • R(E)+S(F),DCHECK
      • Vars
        • K(e);CHECK,S_FLIGHT,XR(G)::B(K)+S(H)
      • Refutation
        • S(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);CHECK,P-FLIGHT,P_SPINP(f)::R(E)+S(F)
        • K(e);CHECK,S_FLIGHT,XR(G)::B(K)+S(H)
      • Refutation
        • K(e);CHECK,S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • K(e);CHECK,S_FLIGHT,XR(G)::B(K)+S(H)
      • Refutation
        • K(e);CHECK,S_FLIGHT,XP(C)
  • Actual
    • Q(B);
    • Threat
      • R(E)+S(F),DCHECK
    • Vars
      • K(e);CHECK,S_FLIGHT::QAB(B)+S(F),DCHECK
      • K(e);CHECK,P-FLIGHT,P_SPINP(f)::R(E)+S(F)
      • K(e);CHECK,P_SPINP(f),S_FLIGHT,XR(G)::B(K)+S(H)
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