MESON Chess Problem Database

Problem Display
PID: 233170 (1N2Rn1q/2k1p1NQ/P2b4/P1P1r3/4p3/2R5/1K5B/8 w - - 0 1)

Dolginovich, Nikolai Osipovich

Freie Presse, 1981

1N2Rn1q/2k1p1NQ/P2b4/P1P1r3/4p3/2R5/1K5B/8

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Rxc5#
    • 1...Rd5
      • 2.cxd6#
    • 1...Rf5
      • 2.cxd6#
    • 1...Rg5
      • 2.cxd6#
    • 1...Rh5
      • 2.cxd6#
    • 1...Re6
      • 2.cxd6#
    • 1...Bxc5
      • 2.Bxe5#
    • 1...e6
      • 2.Sxe6#
  • Tries
    • 1.Se6+?
      • 1...Rxe6
        • 2.cxd6#
      • 1...Sxe6!
    • 1.Qxe4?
      • threat
        • 2.Qc6#
        • 2.Qb7#
      • 1...Rxe4
        • 2.cxd6#
      • 1...Rxc5
        • 2.Rxc5#
        • 2.Qb7#
      • 1...Bxc5
        • 2.Bxe5#
        • 2.Qc6#
        • 2.Qxe5#
      • 1...Rd5
        • 2.cxd6#
      • 1...Qxh2+!
  • Keys
    • 1.Sf5!
      • threat
        • 2.cxd6#
      • 1...Rxc5
        • 2.Bxd6#
      • 1...Bxc5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(b);OGATE,P_SPINB(c),P_SPINR(b),XP(E)::R(C),XR(b)
    • R(b);P_SPINB(c)::R(C)+P(E)DCHECK,XB(c)
    • B(c);OGATEB,P_SPINB(c),P_SPINR(b),XP(E)::B(B),XR(b)
    • P(e);::QAR(H)+S(G),DCHECK,XP(e)
  • Tries
    • Try
      • S(G);CHECK,P_PINP(e)
      • Vars
        • R(b);P_PINR(C),P_SPINB(c),XS(G)::R(C)+P(E)DCHECK,XB(c)
      • Refutation
        • S(f);XS(G)
    • Try
      • Q(H);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);P_SPINB(c),XQ(H)::R(C)+P(E)DCHECK,XB(c)
        • R(b);P_SPINB(c)::R(C)+P(E)DCHECK,XB(c)
      • Refutation
        • Q(g);CHECK,XB(B)
  • Actual
    • S(G);P_PINP(e)
    • Threat
      • R(C)+P(E)DCHECK,XB(c)
    • Vars
      • R(b);OGATE,P_PINR(C),P_SPINB(c),P_SPINR(b),XP(E)::B(B),XB(c)
      • B(c);OGATE,P_SPINB(c),P_SPINR(b),XP(E)::R(C),XB(c)
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