MESON Chess Problem Database

Problem Display
PID: 271662 (B7/6N1/2Rr4/3p4/1N2kP2/4B3/b3K3/8 w - - 0 1)

Poponin, Vladimir Grigorievich

Buletin Problemistic, 1997

B7/6N1/2Rr4/3p4/1N2kP2/4B3/b3K3/8

#2

7 + 4

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Rxe6#
    • 1...Rd7
      • 2.Re6#
    • 1...Rd8
      • 2.Re6#
    • 1...Bb1
      • 2.Rc4#
    • 1...Bc4+
      • 2.Rxc4#
  • Tries
    • 1.Sxa2?
      • threat
        • 2.Sc3#
        • 2.Rc4#
      • 1...d4
        • 2.Rxd6#
      • 1...Rxc6!
    • 1.Sd3?
      • threat
        • 2.Sf2#
        • 2.Sc5#
      • 1...Rxc6
        • 2.Sf2#
      • 1...Bc4
        • 2.Rxc4#
      • 1...d4!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Sc3#
      • 1...Bc4+
        • 2.Rxc4#
      • 1...Kxd5
        • 2.Rc5#
      • 1...Rxd5
        • 2.Re6#
      • 1...Bxd5
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(d);OGATE::R(E),XR(d)
    • R(d);OGATE::R(E)
    • B(a);N_GUARD::R(E)
    • B(a);CHECK,N_GUARD::R(E),XB(a)
  • Tries
    • Try
      • S(C);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB::B(G)+R(E),XR(d)
      • Refutation
        • R(d);XR(E)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);XR(E)::S(C)
        • B(a);N_GUARD,P_PINS(C)::R(E),XB(a)
      • Refutation
        • P(c);
  • Actual
    • S(C);XP(c)
    • Threat
      • S(C)
    • Vars
      • B(a);CHECK,N_GUARD::R(E),XB(a)
      • K(b);OGATEB,S_FLIGHT,XS(C)::B(G)+R(E),DCHECK
      • R(d);OGATE,XS(C)::R(E)
      • B(a);N_GUARD,XS(C)::R(E)
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