MESON Chess Problem Database

Problem Display
PID: 80742 (rk6/NPR1K3/8/8/8/8/8/2R5 w - - 0 1)

Andreev, Aleksandr Grigorevich

Sovietskaya Kuban, 1962

rk6/NPR1K3/8/8/8/8/8/2R5

#2

5 + 2

3713 Snap 2011
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Rd7?
      • threat
        • 2.Sc6#
      • 1...Rxa7
        • 2.Rc8#
      • 1...Kxa7!
  • Keys
    • 1.Rb1!
      • 1...Kxa7
        • 2.b8S#
      • 1...Kxc7
        • 2.bxa8S#
      • 1...Rxa7
        • 2.Rc8#

Anticipated by 139065(0000), 198392(1920)

This anticipates 197289(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Threat
        • S(B)
      • Vars
        • R(a);SBLOCK,XS(B)::R1(A)
      • Refutation
        • K(b);S_FLIGHT,XS(B)
  • Actual
    • R(A);
    • Vars
      • K(b);OGATE,S_FLIGHT,XS(B)::P=S
      • K(b);S_FLIGHT,XR(D)::PXR(a)=S
      • R(a);SBLOCK,XS(B)::R1(D)
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