MESON Chess Problem Database

Problem Display
PID: 8125 (k1KN3R/2p2p2/3p1p1p/NpP1p3/2P3n1/1P2n3/6qr/R6Q w - - 0 1)

Ulanov, Lev

Sinfonie Scacchistiche, 1995

k1KN3R/2p2p2/3p1p1p/NpP1p3/2P3n1/1P2n3/6qr/R6Q

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Ka7
      • 2.Sac6#
    • 1...Qb7+
      • 2.Qxb7#
    • 1...Sxc4
      • 2.Sxc4#
    • 1...Sf2
      • 2.Sac6#
      • 2.Sab7#
    • 1...bxc4
      • 2.Sxc4#
  • Tries
    • 1.Kxc7?
      • threat
        • 2.Sdc6#
      • 1...Qc6+
        • 2.Sdxc6#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Ka7
        • 2.Sac6#
      • 1...Sf2
        • 2.Sac6#
        • 2.Sab7#
      • 1...Sd5+!
    • 1.Sdc6?
      • threat
        • 2.Kxc7#
        • 2.Kd7#
      • 1...Sd5
        • 2.Kd7#
      • 1...Sf2
        • 2.Sb7#
      • 1...Qxc6!
    • 1.Qxg2+?
      • 1...Ka7
        • 2.Sac6#
        • 2.Sab7#
        • 2.Qb7#
      • 1...Sxg2
        • 2.Sac6#
        • 2.Sab7#
      • 1...Sd5
        • 2.Sac6#
        • 2.Sab7#
      • 1...e4
        • 2.Sac6#
        • 2.Sab7#
      • 1...d5
        • 2.Sac6#
        • 2.Sab7#
      • 1...c6
        • 2.Saxc6#
        • 2.Sab7#
      • 1...Rxg2!
  • Keys
    • 1.Kd7!
      • threat
        • 2.Sdc6#
      • 1...Qc6+
        • 2.Sdxc6#
      • 1...Ka7
        • 2.Sac6#
      • 1...Kb8
        • 2.Sdc6#
      • 1...Qb7
        • 2.Qxb7#
      • 1...Sf2
        • 2.Sac6#
      • 1...c6
        • 2.Sdxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(l);N_SPINQ(a),P-FLIGHT::R(A)+S(E),DCHECK
    • Q(a);CHECK,OGATE::QAB1(B),XQ(a)
    • S(c);XP(D)::R(A)+S(E),XS(c)
    • P(e);XP(D)::R(A)+S(E),XP(e)
  • Tries
    • Try
      • K(G);P-FLIGHT,XP(j)
      • Threat
        • R(I)+S(H)
      • Vars
        • Q(a);CHECK::R(I)+S(H),XQ(a)
        • Q(a);CHECK,OGATE::QAB1(B),XQ(a)
        • K(l);N_SPINQ(a),P-FLIGHT::R(A)+S(E),DCHECK
      • Refutation
        • S(c);CHECK,N_SPINQ(a)
    • Try
      • S(H);N_PINQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::R(I)+K(G)
        • S(d);S_CUTQ(a)::R(A)+S(E)
      • Refutation
        • Q(a);P_SPINQ(a),XS(H)
    • Try
      • Q(B);CHECK,XQ(a)
      • Refutation
        • R(b);XQ(B)
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • R(I)+S(H)
    • Vars
      • Q(a);CHECK::R(I)+S(H),XQ(a)
      • K(l);N_SPINQ(a),P-FLIGHT::R(A)+S(E),DCHECK
      • K(l);N_SPINQ(a),P-FLIGHT::R(I)+S(H),DCHECK
      • Q(a);OGATE::QAB1(B),XQ(a)
      • S(d);::R(A)+S(E)
      • P(j);N_SPINQ(a)::R(I)+S(H),XP(j)
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