MESON Chess Problem Database

Problem Display
PID: 46548 (8/Kn6/8/2p1P2Q/2Rq1k2/p7/3N4/5N1B w - - 0 1)

Ovchinnikov, Y

Uralski Problemist, 2002

8/Kn6/8/2p1P2Q/2Rq1k2/p7/3N4/5N1B

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Rxe4#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qf5#
      • 1...Qxe5
        • 2.Qh4#
      • 1...Qxe4
        • 2.Rxe4#
      • 1...Qd7
        • 2.Bd5#
      • 1...Sd6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qg5#
      • 1...Qxe5
        • 2.Qf3#
      • 1...Qxe4
        • 2.Rxe4#
      • 1...Qg1
        • 2.Sf2#
      • 1...Qd8
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);OGATE::R1(D),XQ(b)
  • Tries
    • Try
      • B(B);N_PINQ(b)
      • Threat
        • QAR1(F)
      • Vars
        • Q(b);SBLOCK,XP(E)::QAR2(F)
        • Q(b);OGATE,P_SPINQ(b),XB(B)::R1(D),XQ(b)
        • Q(b);OGATEB::R(D)+B(B)
      • Refutation
        • S(e);
  • Actual
    • S(C);N_PINQ(b)
    • Threat
      • QAB1(F)
    • Vars
      • Q(b);SBLOCK,XP(E)::QAR1(F)
      • Q(b);OGATE,P_SPINQ(b),XS(C)::R1(D),XQ(b)
      • Q(b);::R(D)+S(C)
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