MESON Chess Problem Database

Problem Display
PID: 265926 (7Q/1p6/8/4qr2/2Bk4/3N1PNp/2R2P1K/6B1 w - - 0 1)

Rossomakho, Yakov V

1st Comm., Buletin Problemistic TT, 1993

7Q/1p6/8/4qr2/2Bk4/3N1PNp/2R2P1K/6B1

#2

9 + 5

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Se2#
      • 2.Sxf5#
    • 1...Qg7
      • 2.Se2#
      • 2.Sxf5#
    • 1...Qxh8
      • 2.Se2#
      • 2.Sxf5#
    • 1...Rxf3
      • 2.Qxe5#
    • 1...Rf4
      • 2.Se2#
      • 2.Qxe5#
    • 1...Rf7
      • 2.Qxe5#
    • 1...Rf8
      • 2.Qxe5#
  • Tries
    • 1.Kh1?
      • threat
        • 2.Se2#
        • 2.Sxf5#
      • 1...Rxf3
        • 2.Qxe5#
      • 1...Rf4
        • 2.Se2#
        • 2.Qxe5#
      • 1...Rg5
        • 2.Se2#
      • 1...Rh5
        • 2.Se2#
      • 1...Rf7
        • 2.Se2#
        • 2.Qxe5#
      • 1...Rf8
        • 2.Se2#
        • 2.Qxe5#
      • 1...Rf6!
    • 1.Qd8+?
      • 1...Qd5
        • 2.Se2#
        • 2.Sxf5#
      • 1...Qd6!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qa1#
      • 1...Qxg3+
        • 2.fxg3#
      • 1...Qe1
        • 2.Sxf5#
      • 1...Qa5
        • 2.Se2#
      • 1...Qb5
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD,XP(F)::QAB1(I),XQ(c)
    • R(d);N_GUARD::QAB1(I),XQ(c)
  • Tries
    • Try
      • K(D);N_SPINS(G),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(d);N_GUARD,XP(F)::QAB1(I),XQ(c)
        • R(d);::S(G)
      • Refutation
        • R(d);N_SPINQ(c)
    • Try
      • Q(I);CHECK,N_PINQ(c)
      • Refutation
        • Q(c);P_SPINQ(c)
  • Actual
    • Q(I);N_PINQ(c)
    • Threat
      • QAB(I)
    • Vars
      • Q(c);CHECK,OGATE,XS(G)::B(A)+P(C),XQ(c)
      • Q(c);N_PINS(G)::S(G),XR(d)
      • Q(c);N_PINS(G)::S(G)
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