MESON Chess Problem Database

Problem Display
PID: 242114 (8/B2n4/4Bn2/R2rp3/4kpp1/2PN1r2/2KR1P1N/1Q6 w - - 0 1)

Doukhan, Gerard

StrateGems, 2020

8/B2n4/4Bn2/R2rp3/4kpp1/2PN1r2/2KR1P1N/1Q6

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Sxf2#
    • 1...Rxa5
      • 2.Qb4#
  • Tries
    • 1.Kd1?
      • threat
        • 2.Sc5#
      • 1...Rxf2
        • 2.Sxf2#
      • 1...Rdxd3
        • 2.Ra4#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Rfxd3!
    • 1.Kb2?
      • threat
        • 2.Sc5#
      • 1...Rxf2
        • 2.Sxf2#
      • 1...Rfxd3
        • 2.Re2#
      • 1...Rdxd3
        • 2.Ra4#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Rb5+!
    • 1.Kb3?
      • threat
        • 2.Sc5#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Rxf2
        • 2.Sxf2#
      • 1...Rfxd3
        • 2.Re2#
      • 1...Rdxd3
        • 2.Ra4#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Rb5+!
    • 1.Sxf3?
      • threat
        • 2.Sg5#
      • 1...Kxf3
        • 2.Qh1#
      • 1...gxf3
        • 2.Qe1#
      • 1...Sh7!
    • 1.Qb7?
      • threat
        • 2.Ra4#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Sb6
        • 2.Sc5#
      • 1...Rxd3!
  • Keys
    • 1.Kc1!
      • threat
        • 2.Sc5#
      • 1...Rxf2
        • 2.Sxf2#
      • 1...Rfxd3
        • 2.Re2#
      • 1...Rdxd3
        • 2.Ra4#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Sc5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);P_PINR(C),XP(D)::S(G),XR(a)
    • R(e);N_GUARD,XR(H)::QAR(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAB(A)+S(G),DCHECK
      • Vars
        • R(a);XP(D)::QAB(A)+S(G),DCHECK,XR(a)
        • R(e);N_GUARD,P_PINR(C),P_SPINR(e),XS(G)::R(H)
        • R(e);::QAB(A)+S(G),DCHECK,XR(e)
        • S(h);::QAB(A)+S(G),DCHECK,XS(h)
      • Refutation
        • R(a);P_PINR(C),P_SPINR(a),XS(G)
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAB(A)+S(G),DCHECK
      • Vars
        • R(a);P_PINR(C),XP(D)::QAB(A)+S(G),DCHECK,XR(a)
        • R(a);N_GUARD,P_SPINR(a),XS(G)::R(C)
        • R(e);N_GUARD,P_SPINR(e),XS(G)::R(H)
        • R(e);::QAB(A)+S(G),DCHECK,XR(e)
        • S(h);::QAB(A)+S(G),DCHECK,XS(h)
      • Refutation
        • R(e);CHECK
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAB(A)+S(G),DCHECK
      • Vars
        • S(h);CHECK::QAB(A)+S(G),DCHECK,XS(h)
        • R(a);XP(D)::QAB(A)+S(G),DCHECK,XR(a)
        • R(a);N_GUARD,P_PINP(F),P_SPINR(a),XS(G)::R(C)
        • R(e);N_GUARD,P_PINP(F),P_SPINR(e),XS(G)::R(H)
        • R(e);::QAB(A)+S(G),DCHECK,XR(e)
      • Refutation
        • R(e);CHECK
    • Try
      • S(E);XR(a)
      • Threat
        • S(E)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(E)::QAB(A)
        • P(d);SBLOCK,XS(E)::QAR(A)
      • Refutation
        • S(g);
    • Try
      • Q(A);P_PINR(e)
      • Threat
        • R(H)
      • Vars
        • S(h);N_GUARD::S(G),XS(h)
        • S(h);N_GUARD::S(G)
      • Refutation
        • R(a);XS(G)
  • Actual
    • K(B);P-FLIGHT
    • Threat
      • QAB(A)+S(G),DCHECK
    • Vars
      • R(a);XP(D)::QAB(A)+S(G),DCHECK,XR(a)
      • R(a);N_GUARD,P_SPINR(a),XS(G)::R(C)
      • R(e);N_GUARD,P_SPINR(e),XS(G)::R(H)
      • R(e);P_PINP(F)::QAB(A)+S(G),DCHECK,XR(e)
      • S(h);::QAB(A)+S(G),DCHECK,XS(h)
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