MESON Chess Problem Database

Problem Display
PID: 120738 (2R5/6Q1/3pP3/2NkP1P1/3qN1K1/2PP1B2/8/3R4 w - - 0 1)

Soloviov, Alexey F

3rd Prize, Shakhmatny Listok, 1928/II

2R5/6Q1/3pP3/2NkP1P1/3qN1K1/2PP1B2/8/3R4

#2

12 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1+
      • 2.Sg3#
    • 1...Qf2
      • 2.Sxf2#
    • 1...Qxc5
      • 2.Sxc5#
    • 1...Qxe5
      • 2.Sf6#
      • 2.Qb7#
    • 1...Qxd3
      • 2.Sxd6#
    • 1...Qxe4+
      • 2.Bxe4#
    • 1...dxe5
      • 2.Qb7#
      • 2.Qd7#
  • Tries
    • 1.cxd4?
      • 1...dxc5
        • 2.Qd7#
      • 1...dxe5
        • 2.Qxe5#
        • 2.Qd7#
      • 1...Kxd4!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rxd6#
      • 1...Qg1+
        • 2.Sg3#
      • 1...Qxe4+
        • 2.Bxe4#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Qxc5
        • 2.Sxc5#
      • 1...Qxe5
        • 2.Sf6#
      • 1...Qxd3
        • 2.Sxd6#
      • 1...dxc5
        • 2.Rd6#
      • 1...dxe5
        • 2.Rd6#
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(a);CHECK,N_PINS(E)::B(D)+S(E)
    • Q(a);N_PINS(E)::B(D)+S(E),XQ(a)
    • Q(a);N_PINS(E),XS(G)::B(D)+S(E),XQ(a)
    • Q(a);N_PINS(E),P_SPINQ(a),XP(C)::B(D)+S(E),XP(c)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XS(E)::B(D),XQ(a)
  • Tries
    • Try
      • P(B);N_SPINS(E),XQ(a)
      • Vars
        • P(c);OGATEB,XS(G)::QAR2(K)
      • Refutation
        • K(b);P-FLIGHT,XP(B)
  • Actual
    • R(L);
    • Threat
      • R1(L),XP(c)
    • Vars
      • Q(a);CHECK,N_PINS(E)::B(D)+S(E)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(E)::B(D),XQ(a)
      • K(b);OGATEB,S_FLIGHT,XR(L)::QAB1(K)
      • Q(a);N_PINS(E),XS(G)::B(D)+S(E),XQ(a)
      • Q(a);N_PINS(E),SBLOCK,XP(H)::B(D)+S(E),DCHECK
      • Q(a);N_PINS(E),P_SPINQ(a),XP(C)::B(D)+S(E),XP(c)
      • P(c);XS(G)::R1(L)
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