MESON Chess Problem Database

Problem Display
PID: 250567 (1K1k4/4RB2/2RBr1p1/4p3/1N6/8/2q3Q1/8 w - - 0 1)

Markovtsy, Vassyl Yuriovich

Schweizerische Schachzeitung, 1997

1K1k4/4RB2/2RBr1p1/4p3/1N6/8/2q3Q1/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rc8#
    • 1...Qd1
      • 2.Rc8#
    • 1...Qb3
      • 2.Rc8#
    • 1...Qd3
      • 2.Rc8#
    • 1...Qa4
      • 2.Rc8#
    • 1...Qe4
      • 2.Rc8#
    • 1...Qf5
      • 2.Rc8#
    • 1...Qa2
      • 2.Rc8#
    • 1...Qb2
      • 2.Rc8#
    • 1...Qd2
      • 2.Rc8#
    • 1...Qe2
      • 2.Rc8#
    • 1...Qf2
      • 2.Rc8#
    • 1...Qxg2
      • 2.Rc8#
    • 1...Qxc6
      • 2.Sxc6#
  • Tries
    • 1.Rcc7?
      • threat
        • 2.Rcd7#
        • 2.Red7#
      • 1...Rxd6
        • 2.Re8#
      • 1...Rxe7
        • 2.Bxe7#
      • 1...Qa4
        • 2.Rc8#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qxc7+!
    • 1.Qd5?
      • threat
        • 2.Qa5#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...Rxd6
        • 2.Qxd6#
      • 1...Rxe7
        • 2.Bc7#
      • 1...Qa4
        • 2.Rc8#
      • 1...Qa2
        • 2.Rc8#
      • 1...Qf2
        • 2.Rc8#
      • 1...Qc5!
    • 1.Qg5?
      • threat
        • 2.Bc7#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...Rxd6
        • 2.Rxd6#
      • 1...Rxe7
        • 2.Qxe7#
      • 1...Rf6!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qh8#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...Rxd6
        • 2.Re8#
      • 1...Rxe7
        • 2.Qc8#
      • 1...Qh2
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(a);N_GUARD,P_PINS(B)::R1(C)
    • Q(a);N_GUARD::R1(C)
    • Q(a);N_GUARD,XQ(A)::R1(C)
    • Q(a);XR(C)::S(B),XQ(a)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_GUARD,XB(D)::R1(E)
        • R(c);OGATE,XR(E)::B(D),XR(c)
        • Q(a);N_GUARD::R1(C)
        • Q(a);N_GUARD::S(B),XQ(a)
      • Refutation
        • Q(a);CHECK,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(a);XR(C)::S(B),XQ(a)
        • R(c);OGATE,P_SPINR(c),XB(D)::QAR2(A),XR(c)
        • R(c);SBLOCK,XR(E)::QAR(A)+B(D),DCHECK
        • Q(a);N_GUARD::R1(C)
      • Refutation
        • Q(a);
    • Try
      • Q(A);
      • Threat
        • B(D)
      • Vars
        • Q(a);XR(C)::S(B),XQ(a)
        • R(c);OGATE,XB(D)::R(C),XR(c)
        • R(c);OGATE,P_SPINR(c),XR(E)::QAB1(A),XR(c)
      • Refutation
        • R(c);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • Q(a);XR(C)::S(B),XQ(a)
      • R(c);N_GUARD,XB(D)::R1(E)
      • R(c);OGATE,XR(E)::QAR1(A)
      • Q(a);N_GUARD::R1(C)
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