MESON Chess Problem Database

Problem Display
PID: 243831 (8/7K/8/3R2qk/7b/6pQ/8/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

Problemist Pribuzhya, 1996

8/7K/8/3R2qk/7b/6pQ/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rxe5#
    • 1...Qf5+
      • 2.Rxf5#
    • 1...g2
      • 2.Qf3#
  • Tries
    • 1.Ra5?
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Qb5
        • 2.Rxb5#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qe5
        • 2.Rxe5#
      • 1...g2
        • 2.Qf3#
      • 1...Qxa5!
    • 1.Rb5?
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qe5
        • 2.Rxe5#
      • 1...g2
        • 2.Qf3#
      • 1...Qxb5!
    • 1.Rc5?
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qe5
        • 2.Rxe5#
      • 1...g2
        • 2.Qf3#
      • 1...Qxc5!
    • 1.Re5?
      • 1...Qf5+
        • 2.Rxf5#
      • 1...g2
        • 2.Qf3#
      • 1...Qxe5!
    • 1.Rf5?
      • 1...g2
        • 2.Qf3#
      • 1...Qxf5+!
    • 1.Qxg3?
      • threat
        • 2.Qf3#
      • 1...Qf5+
        • 2.Qg6#
      • 1...Qxd5
        • 2.Qg6#
      • 1...Qe5
        • 2.Qg6#
      • 1...Bxg3!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qe2#
      • 1...Qf5+
        • 2.Qg6#
      • 1...Qxd5
        • 2.Qg6#
      • 1...Qe5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(c);OGATEB::R(B),XQ(c)
    • Q(c);CHECK,OGATEB::R(B),XQ(c)
    • P(a);OGATE::QAB(A)
  • Tries
    • Try
      • R(B);
      • Vars
        • Q(c);CHECK,OGATEB::R(B),XQ(c)
        • Q(c);OGATEB::R(B),XQ(c)
        • P(a);OGATE::QAB(A)
      • Refutation
        • Q(c);N_SPINQ(c),XR(B)
    • Try
      • R(B);
      • Vars
        • Q(c);CHECK,OGATEB::R(B),XQ(c)
        • Q(c);OGATEB::R(B),XQ(c)
        • P(a);OGATE::QAB(A)
      • Refutation
        • Q(c);N_SPINQ(c),XR(B)
    • Try
      • R(B);
      • Vars
        • Q(c);CHECK,OGATEB::R(B),XQ(c)
        • Q(c);OGATEB::R(B),XQ(c)
        • P(a);OGATE::QAB(A)
      • Refutation
        • Q(c);N_SPINQ(c),XR(B)
    • Try
      • R(B);
      • Vars
        • Q(c);CHECK,OGATEB::R(B),XQ(c)
        • P(a);OGATE::QAB(A)
      • Refutation
        • Q(c);N_SPINQ(c),XR(B)
    • Try
      • R(B);
      • Vars
        • P(a);OGATE::QAB(A)
      • Refutation
        • Q(c);CHECK,N_SPINQ(c),XR(B)
    • Try
      • Q(A);N_PINB(b),XP(a)
      • Threat
        • QAB(A)
      • Vars
        • Q(c);CHECK,OGATE::QAB1(A)
        • Q(c);N_SPINQ(c),OGATE,XR(B)::QAB1(A)
        • Q(c);OGATE::QAB1(A)
      • Refutation
        • B(b);XQ(A)
  • Actual
    • Q(A);N_PINB(b)
    • Threat
      • QAB(A)
    • Vars
      • Q(c);CHECK::QAB1(A)
      • Q(c);N_SPINQ(c),XR(B)::QAB1(A)
      • Q(c);::QAB1(A)
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