MESON Chess Problem Database

Problem Display
PID: 98485 (8/8/K7/2kp4/1R1R4/7Q/1N6/8 w - - 0 1)

Petkov, Petko Andonov

Problemas, 1963

8/8/K7/2kp4/1R1R4/7Q/1N6/8

#2

5 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rxd5+?
      • 1...Kxb4
        • 2.Rb5#
      • 1...Kc6
        • 2.Qd7#
      • 1...Kxd5!
  • Keys
    • 1.Sc4!
      • 1...Kxb4
        • 2.Qa3#
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kc6
        • 2.Qc8#
      • 1...dxc4
        • 2.Rbxc4#

Anticipated by 102049(1882), 96826(1945)

This anticipates 187098(1994-1995), 88717(2000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK,XP(b)
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(C)::R1(D)
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,XR(D)
  • Actual
    • S(A);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • K(a);OGATEB,S_FLIGHT,XR(D)::QAB1(B)
      • K(a);P-FLIGHT::QAR2(B)
      • P(b);OGATE,XS(A)::R1(C),XP(b)
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