MESON Chess Problem Database

Problem Display
PID: 61058 (3K2b1/2p3Pr/3Bk1B1/1nQN1NR1/2P2p2/4q3/4R2b/3r4 w - - 0 1)

Brown, David Leo

1st Prize, KeyStip 03. Ty., 1972

3K2b1/2p3Pr/3Bk1B1/1nQN1NR1/2P2p2/4q3/4R2b/3r4

#2

10 + 9

3753 FIDE Album (1971-1973) 1978
17108 White and Black From Brown (David L Brown) 1995
14860 Mightiest of Minds Solving Ty. 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Rxe4#
    • 1...Qe5
      • 2.Rxe5#
    • 1...Rxg7
      • 2.Sxg7#
  • Tries
    • 1.Bxc7?
      • threat
        • 2.Qe7#
      • 1...Rxg7
        • 2.Sxg7#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rxd5+!
    • 1.Qxc7?
      • threat
        • 2.Qd7#
        • 2.Qe7#
        • 2.Qc8#
      • 1...Rxd5
        • 2.Qe7#
      • 1...Rxg7
        • 2.Sxg7#
      • 1...Sxd6
        • 2.Qxd6#
        • 2.Qe7#
      • 1...Sa7
        • 2.Qd7#
        • 2.Qe7#
      • 1...Sxc7!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qe7#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Sd4#
      • 1...Qxc5
        • 2.Bd4#
      • 1...Rxg7
        • 2.Sxg7#
      • 1...Qa3
        • 2.Bc3#
      • 1...Sd6
        • 2.Sxc7#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATE::R(A),XQ(c)
    • Q(c);OGATE::R1(A),XQ(c)
    • R(h);XP(I)::S(E),XR(h)
  • Tries
    • Try
      • B(G);P_SPINS(D),XP(g)
      • Threat
        • QAR1(C)
      • Vars
        • R(h);XP(I)::S(E),XR(h)
        • S(e);N_GUARD,N_PINS(D)::QAR1(C),XS(e)
      • Refutation
        • R(a);CHECK,XS(D)
    • Try
      • Q(C);XP(g)
      • Threat
        • DUALS(3)
      • Vars
        • R(a);P_PINB(G),XS(D)::QAR1(C)
        • R(h);XP(I)::S(E),XR(h)
      • Refutation
        • S(e);XQ(C)
  • Actual
    • B(G);N_PINQ(c),P_SPINS(D)
    • Threat
      • QAR1(C)
    • Vars
      • R(a);CHECK,OGATE,XS(D)::QAB1(C),XR(a)
      • K(f);P-FLIGHT,P_SPINQ(c),XB(G)::R(F)+S(E)
      • Q(c);OGATEB,XQ(C)::R(A)+B(G)
      • R(h);XP(I)::S(E),XR(h)
      • Q(c);OGATEB::R(A)+B(G)
      • S(e);N_PINS(D)::S(D),XP(g)
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