MESON Chess Problem Database

Problem Display
PID: 273890 (1Q3R1n/3rk1p1/4p3/p2p4/8/2B5/8/2K5 w - - 0 1)

Pedler, Norman

The Problemist, 1932

1Q3R1n/3rk1p1/4p3/p2p4/8/2B5/8/2K5

#2

4 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qe8#
    • 1...Ra7
      • 2.Qd8#
    • 1...Rb7
      • 2.Qd8#
    • 1...Rc7
      • 2.Qd8#
    • 1...Rd8
      • 2.Qxd8#
    • 1...Sf7
      • 2.Re8#
    • 1...g5
      • 2.Bf6#
    • 1...g6
      • 2.Bf6#
  • Tries
    • 1.Bb4+?
      • 1...Rd6
        • 2.Qxd6#
        • 2.Qd8#
        • 2.Qe8#
      • 1...axb4!
    • 1.Be5?
      • threat
        • 2.Qe8#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Rc7+!
  • Keys
    • 1.Bxg7!
      • threat
        • 2.Bf6#
      • 1...Rc7+
        • 2.Qxc7#
      • 1...Rd6
        • 2.Qe8#
      • 1...Ra7
        • 2.Qd8#
      • 1...Rb7
        • 2.Qd8#
      • 1...Rd8
        • 2.Qxd8#
      • 1...e5
        • 2.Qxe5#
      • 1...Sf7
        • 2.Re8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(d);SBLOCK::QAR1(C)
    • R(d);N_GUARD::QAB1(C)
    • R(d);N_GUARD,P_PINB(B)::QAB1(C)
    • R(d);N_GUARD::QAB1(C),XR(d)
    • S(g);SBLOCK::R1(D)
    • P(f);N_GUARD::B(B)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • P(a);XB(B)
    • Try
      • B(B);
      • Threat
        • QAR1(C)
      • Vars
        • R(d);N_GUARD::QAB1(C),XR(d)
      • Refutation
        • R(d);CHECK
  • Actual
    • B(B);XP(f)
    • Threat
      • B(B)
    • Vars
      • R(d);CHECK,OGATEB::QAR2(C),XR(d)
      • R(d);SBLOCK::QAR1(C)
      • R(d);N_GUARD::QAB1(C)
      • R(d);N_GUARD::QAB1(C),XR(d)
      • P(c);OGATEB::QAR2(C),XP(c)
      • S(g);SBLOCK::R1(D)
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Developed and maintained by Brian Stephenson.
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