MESON Chess Problem Database

Problem Display
PID: 179404 (7Q/3pK3/2r1pp2/1P1k1p2/1PN1rP2/2BP4/8/1B6 w - - 0 1)

Petite, Efren

Problem Observer, 2010

7Q/3pK3/2r1pp2/1P1k1p2/1PN1rP2/2BP4/8/1B6

#2

9 + 7

136 Problem Observer 2012
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Sxe3#
    • 1...Rd4
      • 2.Se3#
    • 1...Rxf4
      • 2.Se3#
    • 1...Rc5
      • 2.Sb6#
    • 1...Rb6
      • 2.Sxb6#
    • 1...Rc7
      • 2.Sb6#
    • 1...Rc8
      • 2.Sb6#
  • Tries
    • 1.dxe4+?
      • 1...fxe4
        • 2.Se3#
      • 1...Kxc4!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Se3#
        • 2.Sb6#
      • 1...Rexc4
        • 2.Qh1#
      • 1...Rcxc4
        • 2.Qa8#
      • 1...Re3
        • 2.Sxe3#
        • 2.Sb6#
      • 1...Rb6
        • 2.Se3#
        • 2.Sxb6#

Anticipated by 168371(1990)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::S(E),XR(a)
    • R(a);N_GUARD::S(E)
    • R(a);N_GUARD,XP(F)::S(E)
    • R(d);N_GUARD::S(E)
    • R(d);N_GUARD::S(E),XR(d)
  • Tries
    • Try
      • P(C);CHECK,XR(a)
      • Vars
        • P(c);XP(C)::S(E)
      • Refutation
        • K(b);S_FLIGHT,XS(E)
  • Actual
    • B(A);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);OGATEB,P_SPINR(a),XS(E)::QAB(I)
      • R(d);OGATEB,P_SPINR(d),XS(E)::QAB(I)
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Developed and maintained by Brian Stephenson.
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