MESON Chess Problem Database

Problem Display
PID: 77511 (8/4P3/8/7R/8/8/7q/5K1k w - - 0 1)

Cyrulik, Stepan Pavlovich

Kirillov, Stanislav Vasilovich

Problemist Pribuzhya, 1992

8/4P3/8/7R/8/8/7q/5K1k

#2

3 + 2

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3+
      • 2.Rxh3#
    • 1...Qh4
      • 2.Rxh4#
  • Tries
    • 1.Rh4?
      • 1...Qh3+
        • 2.Rxh3#
      • 1...Qxh4!
    • 1.Rh6?
      • 1...Qh3+
        • 2.Rxh3#
      • 1...Qh4
        • 2.Rxh4#
      • 1...Qh5
        • 2.Rxh5#
      • 1...Qxh6!
    • 1.Rh7?
      • 1...Qh3+
        • 2.Rxh3#
      • 1...Qh4
        • 2.Rxh4#
      • 1...Qh5
        • 2.Rxh5#
      • 1...Qh6
        • 2.Rxh6#
      • 1...Qxh7!
    • 1.Rh8?
      • 1...Qh3+
        • 2.Rxh3#
      • 1...Qh4
        • 2.Rxh4#
      • 1...Qh5
        • 2.Rxh5#
      • 1...Qh6
        • 2.Rxh6#
      • 1...Qh7
        • 2.Rxh7#
      • 1...Qxh8!
    • 1.e8S?
      • 1...Qh3+
        • 2.Rxh3#
      • 1...Qh4
        • 2.Rxh4#
      • 1...Qxh5!
    • 1.e8B?
      • threat
        • 2.Bc6#
      • 1...Qh3+
        • 2.Rxh3#
      • 1...Qh4
        • 2.Rxh4#
      • 1...Qxh5!
    • 1.e8R?
      • 1...Qh3+
        • 2.Rxh3#
      • 1...Qh4
        • 2.Rxh4#
      • 1...Qxh5!
  • Keys
    • 1.e8Q!
      • threat
        • 2.Qc6#
        • 2.Qe4#
        • 2.Qa8#
      • 1...Qh3+
        • 2.Rxh3#
      • 1...Qxh5
        • 2.Qxh5#
      • 1...Qh4
        • 2.Rxh4#

This anticipates 7721(1993)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK,OGATEB::R(B),XQ(b)
    • Q(b);OGATEB::R(B),XQ(b)
  • Tries
    • Try
      • R(B);
      • Vars
        • Q(b);CHECK,OGATEB::R(B),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XR(B)
    • Try
      • R(B);
      • Vars
        • Q(b);CHECK,OGATEB::R(B),XQ(b)
        • Q(b);OGATEB::R(B),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XR(B)
    • Try
      • R(B);
      • Vars
        • Q(b);CHECK,OGATEB::R(B),XQ(b)
        • Q(b);OGATEB::R(B),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XR(B)
    • Try
      • R(B);
      • Vars
        • Q(b);CHECK,OGATEB::R(B),XQ(b)
        • Q(b);OGATEB::R(B),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XR(B)
    • Try
      • P(C);
      • Vars
        • Q(b);CHECK,OGATEB::R(B),XQ(b)
        • Q(b);OGATEB::R(B),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XR(B)
    • Try
      • P(C);
      • Threat
        • B(C)
      • Vars
        • Q(b);CHECK,OGATEB::R(B),XQ(b)
        • Q(b);OGATEB::R(B),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XR(B)
    • Try
      • P(C);
      • Vars
        • Q(b);CHECK,OGATEB::R(B),XQ(b)
        • Q(b);OGATEB::R(B),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XR(B)
  • Actual
    • P(C);
    • Threat
      • DUALS(3)
    • Vars
      • Q(b);CHECK,OGATEB::R(B),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XR(B)::QAR(C),XQ(b)
      • Q(b);OGATEB::R(B),XQ(b)
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