MESON Chess Problem Database

Problem Display
PID: 157405 (3n3N/8/3p4/3Qpk1N/Rq3B1K/4PR2/4P3/1b6 w - - 0 1)

Vilner, Yakov Semyonovich

64 Shakhmatnoe obozrenie, 1928

3n3N/8/3p4/3Qpk1N/Rq3B1K/4PR2/4P3/1b6

#2

9 + 6

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1+
      • 2.Bg3#
    • 1...Qd2
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qa3
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qc3
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qa5
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qc5
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qb2
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qb3
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qxf4+
      • 2.Rfxf4#
      • 2.Raxf4#
    • 1...Qb5
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qb6
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qb7
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
    • 1...Qb8
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bxe5#
      • 2.Bg5#
      • 2.Bh6#
  • Tries
    • 1.Qf7+?
      • 1...Ke4
        • 2.Sg3#
        • 2.Rxb4#
      • 1...Sxf7!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg6#
      • 1...Qe1+
        • 2.Bg3#
      • 1...Qxf4+
        • 2.Qg4#
      • 1...Ke4
        • 2.Sg3#
      • 1...exf4
        • 2.Qd5#

This is a version of 157404

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK,N_PINB(E)::R(C)+B(E)
  • Tries
    • Try
      • Q(G);CHECK,N_PINP(c)
      • Refutation
        • S(f);XQ(G)
  • Actual
    • Q(G);N_PINP(c)
    • Threat
      • QAB1(G)
    • Vars
      • Q(b);CHECK,N_PINB(E)::R(C)+B(E)
      • Q(b);CHECK,P_SPINQ(b),XB(E)::QAB1(G)
      • K(d);N_PINB(E),P_SPINQ(b),S_FLIGHT::S(H)
      • P(c);OGATEB,P_SPINP(c),XB(E)::QAR2(G)
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