MESON Chess Problem Database

Problem Display
PID: 60025 (7B/qPQ2Rr1/rp2p2b/1pPB2p1/1Npkp3/1b6/3P2K1/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

2nd HM., Brisbane Courier, 1927

7B/qPQ2Rr1/rp2p2b/1pPB2p1/1Npkp3/1b6/3P2K1/8

#2

9 + 12

SOLUTION

  • SOUND
  • Tries
    • 1.Bxg7+?
      • 1...e5
        • 2.Bxe5#
      • 1...Bxg7!
    • 1.Qd6?
      • threat
        • 2.Bc6#
        • 2.Bxe6#
      • 1...Qxb7
        • 2.Bc6#
        • 2.Bxb7#
      • 1...bxc5
        • 2.Bc6#
      • 1...exd5
        • 2.Qxd5#
      • 1...c3
        • 2.Bxb3#
      • 1...e3
        • 2.Bf3#
        • 2.Bc6#
      • 1...e5
        • 2.Bc6#
        • 2.Be6#
      • 1...Qb8!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Bxe6#
      • 1...Qxb7
        • 2.Bxb7#
      • 1...bxc5
        • 2.Bc6#
      • 1...exd5
        • 2.Rxd5#
      • 1...c3
        • 2.Bxb3#
      • 1...e3
        • 2.Bf3#
      • 1...e5
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(I);CHECK,XR(l)
      • Vars
        • P(i);P_SPINP(i)::B(I),XP(i)
      • Refutation
        • B(j);XB(I)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);XP(D)::QAR(G)+B(E)
        • P(i);OGATE,P_SPINP(i),XB(E)::QAR1(G),XP(i)
        • P(b);OGATE::QAR(G)+B(E),XB(a)
      • Refutation
        • Q(k);
  • Actual
    • R(H);
    • Threat
      • R(H)+B(E),XP(i)
    • Vars
      • Q(k);OGATE,XP(F)::R(H)+B(E),XQ(k)
      • P(h);SBLOCK,XP(D)::R(H)+B(E)
      • P(i);OGATE,P_SPINP(i),XB(E)::R1(H),XP(i)
      • P(b);OGATE::R(H)+B(E),XB(a)
      • P(d);OGATE::R(H)+B(E)
      • P(i);N_SPINR(l),OGATE::R(H)+B(E)
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