MESON Chess Problem Database

Problem Display
PID: 206237 (1R2N1Nk/5K1P/4P3/8/8/pp6/1q4P1/Q7 w - - 0 1)

Lipton, Michael

Probleemblad, 2019

1R2N1Nk/5K1P/4P3/8/8/pp6/1q4P1/Q7

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh7
      • 2.Qh1#
    • 1...Qg7+
      • 2.Qxg7#
  • Tries
    • 1.Kg6?
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Qc3
        • 2.Qxc3#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...a2
        • 2.Qxb2#
      • 1...Qxa1!
    • 1.Sd6?
      • threat
        • 2.Sf6#
      • 1...Qf6+
        • 2.Sxf6#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Kxh7
        • 2.Qh1#
      • 1...Qc3!
    • 1.Sc7?
      • threat
        • 2.Sf6#
      • 1...Qf6+
        • 2.Sxf6#
      • 1...Qg7+
        • 2.Qxg7#
      • 1...Kxh7
        • 2.Qh1#
      • 1...Qd4!
    • 1.Qxb2+?
      • 1...Kxh7
        • 2.Qg7#
      • 1...axb2!
  • Keys
    • 1.Sgf6!
      • threat
        • 2.Sd6#
        • 2.Sc7#
        • 2.Sg7#
      • 1...Qxf6+
        • 2.Sxf6#
      • 1...Qxg2
        • 2.Sg7#
      • 1...Qc3
        • 2.Sc7#
      • 1...Qc1
        • 2.Sc7#
      • 1...Qd4
        • 2.Sd6#
      • 1...Qe5
        • 2.Sd6#
        • 2.Sc7#
      • 1...Qc2
        • 2.Sc7#
      • 1...Qd2
        • 2.Sd6#

This is after

After David Shire.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • K(d);N_SPINQ(a),OGATEB,P-FLIGHT,XP(E)::QAR(A)
    • Q(a);CHECK,OGATE::QAB1(A),XQ(a)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • Q(a);CHECK,OGATE::QAB(A),XQ(a)
        • Q(a);CHECK,OGATE::QAB1(A),XQ(a)
        • Q(a);OGATE::QAB(A),XQ(a)
        • P(b);N_GUARD::QAB(A),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XQ(A)
    • Try
      • S(G);
      • Threat
        • R(F)+S(H)
      • Vars
        • Q(a);CHECK::R(F)+S(H),XQ(a)
        • Q(a);CHECK,OGATE::QAB1(A),XQ(a)
        • K(d);N_SPINQ(a),OGATEB,P-FLIGHT,XP(E)::QAR(A)
      • Refutation
        • Q(a);
    • Try
      • S(G);
      • Threat
        • R(F)+S(H)
      • Vars
        • Q(a);CHECK::R(F)+S(H),XQ(a)
        • Q(a);CHECK,OGATE::QAB1(A),XQ(a)
        • K(d);N_SPINQ(a),OGATEB,P-FLIGHT,XP(E)::QAR(A)
      • Refutation
        • Q(a);
    • Try
      • Q(A);CHECK,XQ(a)
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAR1(A)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • S(H);N_PINQ(a)
    • Threat
      • DUALS(3)
    • Vars
      • Q(a);CHECK,P_SPINQ(a),XS(H)::R(F)+S(G),XQ(a)
      • Q(a);XP(B)::R(F)+S(G)
      • Q(a);::R(F)+S(G)
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