MESON Chess Problem Database

Problem Display
PID: 51852 (1Q2R1NK/r1b4p/r3PP2/1P1kP3/n1N1R1pq/4B3/1PB5/8 w - - 0 1)

Kopyl, Valery Volodimirovich

The Problemist, 2004

(First published on Thu Jan 1 2004)

1Q2R1NK/r1b4p/r3PP2/1P1kP3/n1N1R1pq/4B3/1PB5/8

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6+
      • 2.Sxf6#
    • 1...Bxe5
      • 2.Qxe5#
    • 1...Bb6
      • 2.Qd6#
    • 1...Sc5
      • 2.Rd4#
  • Tries
    • 1.Qb7+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rxb7!
    • 1.b4?
      • threat
        • 2.Rd4#
      • 1...Qxf6+
        • 2.Sxf6#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...Bb6
        • 2.Qd6#
      • 1...g3!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Se7#
      • 1...Qxf6+
        • 2.Sxf6#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Bxe5
        • 2.Rxe5#
      • 1...Ba5
        • 2.Rd4#
      • 1...Bb6
        • 2.Qc6#
      • 1...Bd6
        • 2.Rd4#
      • 1...Bb8
        • 2.Rd4#
      • 1...Bd8
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(c);CHECK,XP(I)::S(L),XQ(c)
    • B(g);OGATE,P_PINP(I),XP(G)::QAR1(J),XB(g)
    • B(g);OGATE::QAR1(J)
    • S(a);SBLOCK::R1(E)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(J),XR(e)
      • Refutation
        • R(f);XQ(J)
    • Try
      • P(A);
      • Threat
        • R1(E)
      • Vars
        • Q(c);CHECK,XP(I)::S(L),XQ(c)
        • B(g);OGATE,P_PINP(I),XP(G)::QAR1(J),XB(g)
        • B(g);OGATE::QAR1(J)
      • Refutation
        • P(b);
  • Actual
    • Q(J);
    • Threat
      • S(L)
    • Vars
      • Q(c);CHECK,XP(I)::S(L),XQ(c)
      • R(e);OGATE,XP(H)::QAB1(J),XR(e)
      • B(g);OGATE,P_PINP(I),XP(G)::R1(E),XB(g)
      • B(g);::R1(E)
      • B(g);OGATE::QAB1(J)
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