MESON Chess Problem Database

Problem Display
PID: 136408 (7b/K5Q1/5pP1/1R1p1np1/5p2/2B1kBP1/2R1Pp2/5n2 w - - 0 1)

Delobel, Bernard

Source?, 0000

7b/K5Q1/5pP1/1R1p1np1/5p2/2B1kBP1/2R1Pp2/5n2

#2

9 + 9

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Sh4
      • 2.Qe7#
    • 1...Sh6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Bd2+?
      • 1...Kd4
        • 2.Rxd5#
      • 1...Sxd2!
    • 1.Rb3?
      • threat
        • 2.Ba1#
        • 2.Bb2#
        • 2.Be5#
        • 2.Bxf6#
      • 1...fxg3
        • 2.Be5#
      • 1...Sd4
        • 2.Bd2#
      • 1...d4
        • 2.Bd2#
      • 1...Sd2!
    • 1.Rxd5?
      • threat
        • 2.Rd3#
      • 1...Sd4
        • 2.Bxd4#
      • 1...fxg3!
  • Keys
    • 1.Bxf6!
      • threat
        • 2.Rb3#
      • 1...fxg3
        • 2.Bxg5#
      • 1...Sd2
        • 2.Rc3#
      • 1...Sd4
        • 2.Bxd4#
      • 1...d4
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::QAR(I)
    • S(f);N_GUARD::QAR(I),XS(f)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(c);P_SPINP(h),S_FLIGHT::R1(F),XP(e)
      • Refutation
        • S(a);XB(C)
    • Try
      • R(F);
      • Threat
        • DUALS(4)
      • Vars
        • P(d);XP(E)::R(F)+B(C)
        • S(f);SBLOCK::R(F)+B(C),DCHECK
        • P(e);SBLOCK::R(F)+B(C),DCHECK
      • Refutation
        • S(a);
    • Try
      • R(F);XP(e)
      • Threat
        • R1(F)
      • Vars
        • S(f);N_GUARD::B(C),XS(f)
      • Refutation
        • P(d);XP(E)
  • Actual
    • B(C);XP(h)
    • Threat
      • R(F)
    • Vars
      • P(d);OGATEB,XP(E)::B(C),XP(g)
      • S(a);SBLOCK::R(A)
      • S(f);N_GUARD::B(C),XS(f)
      • P(e);OGATE,SBLOCK::R(F)
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