MESON Chess Problem Database

Problem Display
PID: 74995 (8/6B1/p7/Q7/K1krr3/8/2PR4/2R5 w - - 0 1)

Tabidze, Otar

Source?, 1965

8/6B1/p7/Q7/K1krr3/8/2PR4/2R5

#2

6 + 4

6160 A Chess Philosophy of Otar Tabidze 1999
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.cxd3#
    • 1...Rd5
      • 2.Qc3#
      • 2.Qb4#
      • 2.Qxd5#
    • 1...Rd6
      • 2.Qc3#
      • 2.Qb4#
    • 1...Rd7
      • 2.Qc3#
      • 2.Qb4#
    • 1...Rd8
      • 2.Qc3#
      • 2.Qb4#
      • 2.Qc7#
    • 1...Re1
      • 2.Rxd4#
    • 1...Re2
      • 2.Rxd4#
    • 1...Re3
      • 2.Rxd4#
    • 1...Re6
      • 2.Rxd4#
    • 1...Re7
      • 2.Rxd4#
    • 1...Re8
      • 2.Rxd4#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Rc3#
      • 1...Re3
        • 2.Rxd4#
      • 1...Rxd3!
    • 1.Qb5+?
      • 1...Kc3+
        • 2.Qb4#
      • 1...axb5+!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qc6#
      • 1...Kc3+
        • 2.Qb4#
      • 1...Kd5+
        • 2.c4#
      • 1...Re5
        • 2.Qxd4#
      • 1...Rd5
        • 2.Qb4#
      • 1...Rd6
        • 2.Qb4#
      • 1...Re6
        • 2.Qxd4#

This anticipates 99755(1977)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(b);OGATE::R(A)+P(B)DCHECK,XR(b)
    • R(c);N_GUARD::R1(C),XR(b)
  • Tries
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • R(c);N_GUARD::R1(C),XR(b)
      • Refutation
        • R(b);XR(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);CHECK,P-FLIGHT,P_SPINR(b)::QAB1(E)
      • Refutation
        • P(d);CHECK,XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • K(a);CHECK,P-FLIGHT,P_SPINR(b)::QAB1(E)
      • K(a);CHECK,OGATE,P_SPINR(b),S_FLIGHT::P(B)
      • R(c);N_GUARD::QAR1(E),XR(b)
      • R(b);::QAR1(E)
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