MESON Chess Problem Database

Problem Display
PID: 11466 (8/5K2/6P1/3pk3/1Q3NP1/8/5R1b/1b4n1 w - - 0 1)

Allen, Frederick B

Chess, 1939

8/5K2/6P1/3pk3/1Q3NP1/8/5R1b/1b4n1

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Sd3#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Bxg6+
      • 2.Sxg6#
    • 1...Bxf4
      • 2.Qxf4#
    • 1...d4
      • 2.Qe7#
  • Tries
    • 1.Re2+?
      • 1...Be4
        • 2.Sd3#
      • 1...Sxe2!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Rxd5#
      • 1...Bxg6+
        • 2.Sxg6#
      • 1...Bxf4
        • 2.Qe7#
      • 1...Be4
        • 2.Qb8#
      • 1...d4
        • 2.Qxd4#
      • 1...Ba2
        • 2.Sd3#
      • 1...Bd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • B(a);CHECK,XP(E)::S(C),XB(a)
    • B(c);OGATE,XS(C)::QAB1(B),XB(c)
    • P(d);SBLOCK::QAR2(B)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • B(a);P_SPINB(a)::S(C)
      • Refutation
        • S(b);XR(A)
  • Actual
    • R(A);
    • Threat
      • R1(A),XP(d)
    • Vars
      • B(a);CHECK,XP(E)::S(C),XB(a)
      • B(c);SBLOCK,XS(C)::QAR2(B)
      • B(a);SBLOCK::QAB(B)
      • P(d);::QAB1(B),XP(d)
      • B(a);N_GUARD::S(C)
      • B(a);N_GUARD::S(C),XB(a)
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Developed and maintained by Brian Stephenson.
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