MESON Chess Problem Database

Problem Display
PID: 196414 (8/8/8/8/5KN1/4P1RP/8/4QNqk w - - 0 1)

Libis, Zdenek

Sachova skladba, 2011

8/8/8/8/5KN1/4P1RP/8/4QNqk

#2

7 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2+
      • 2.Sxf2#
    • 1...Qh2
      • 2.Sfxh2#
    • 1...Qxe3+
      • 2.Sfxe3#
    • 1...Qxf1+
      • 2.Qxf1#
  • Tries
    • 1.Kf3?
      • 1...Qf2+
        • 2.Sxf2#
      • 1...Qxe3+
        • 2.Sfxe3#
      • 1...Qxf1+
        • 2.Qxf1#
      • 1...Qxg3+
        • 2.Sxg3#
      • 1...Qh2
        • 2.Sfxh2#
      • 1...Qg2+!
    • 1.Sd2?
      • threat
        • 2.Rxg1#
        • 2.Qxg1#
      • 1...Qf1+
        • 2.Qxf1#
      • 1...Qxe1!
    • 1.Sfh2?
      • threat
        • 2.Rxg1#
        • 2.Qxg1#
      • 1...Qf1+
        • 2.Qxf1#
      • 1...Qxe1!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Rxg1#
        • 2.Qxg1#
      • 1...Qxf2+
        • 2.Sxf2#
      • 1...Qxg3+
        • 2.Sxg3#
      • 1...Qxf1
        • 2.Qxf1#
      • 1...Qh2
        • 2.Qxh2#
      • 1...Qg2
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);CHECK,N_GUARD::S(G),XQ(a)
    • Q(a);P_PINR(D)::QAR(A)+S(B),XQ(a)
    • Q(a);CHECK,XP(C)::QAR(A)+S(B),XQ(a)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XS(B)::QAR2(A),XQ(a)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • Q(a);CHECK,N_GUARD::S(G),XQ(a)
        • Q(a);CHECK,XP(C)::QAR(A)+S(B),XQ(a)
        • Q(a);CHECK,OGATE,P_SPINQ(a),XS(B)::QAR2(A),XQ(a)
        • Q(a);CHECK,XR(D)::QAR(A)+S(B),DCHECK,XQ(a)
        • Q(a);::QAR(A)+S(B),XQ(a)
      • Refutation
        • Q(a);CHECK
    • Try
      • S(B);P_PINQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATEB::QAR2(A),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XQ(A)
    • Try
      • S(B);P_PINQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATEB::QAR2(A),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XQ(A)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);CHECK,XQ(A)::S(G),XQ(a)
      • Q(a);CHECK,XR(D)::S(B),XQ(a)
      • Q(a);OGATE,P_PINQ(A),XS(B)::QAR2(A),XQ(a)
      • Q(a);N_GUARD,P_PINR(D)::QAR1(A),XQ(a)
      • Q(a);N_GUARD::QAB1(A),XQ(a)
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