MESON Chess Problem Database

Problem Display
PID: 107905 (K1R5/b6B/5Q2/3ppn2/3k4/N5R1/3r1r2/4N3 w - - 0 1)

Chiasson, Joseph Emile

Matou, 1991

K1R5/b6B/5Q2/3ppn2/3k4/N5R1/3r1r2/4N3

#2

7 + 7

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Sb5#
    • 1...Sh4
      • 2.Sb5#
    • 1...Sh6
      • 2.Sb5#
    • 1...Se7
      • 2.Sb5#
    • 1...Sg7
      • 2.Sb5#
  • Tries
    • 1.Rg4+?
      • 1...Ke3
        • 2.Qxe5#
      • 1...Rf4!
    • 1.Qh4+?
      • 1...Sxh4
        • 2.Sb5#
      • 1...e4
        • 2.Qf6#
      • 1...Rf4!
  • Keys
    • 1.Re3!
      • threat
        • 2.Qxe5#
      • 1...Kxe3
        • 2.Qxe5#
      • 1...Sxe3
        • 2.Sb5#
      • 1...Bb8
        • 2.Qb6#

This anticipates 140270(2003)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(f);::S(B)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(c);N_SPINP(e),S_FLIGHT::QAR2(D),XP(e)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(D);CHECK,N_PINP(e)
      • Vars
        • S(f);XQ(D)::S(B)
        • P(e);OGATEB,P_SPINP(e),SBLOCK::QAB(D)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • R(C);
    • Threat
      • QAB1(D),XP(e)
    • Vars
      • K(c);N_SPINP(e),S_FLIGHT,XR(C)::QAR2(D),XP(e)
      • S(f);SBLOCK,XR(C)::S(B)
      • B(g);N_GUARD::QAB(D)
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