MESON Chess Problem Database

Problem Display
PID: 103479 (1n6/5p2/3p1N1R/p2rkp2/K4R2/3pB3/B2P4/3Q4 w - - 0 1)

Bertrand, Ernest

La Presse, 1894

1n6/5p2/3p1N1R/p2rkp2/K4R2/3pB3/B2P4/3Q4

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Sd7#
    • 1...Sc6
      • 2.Sd7#
    • 1...Sd7
      • 2.Sxd7#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qxd5#
      • 1...Rd4+
        • 2.Bxd4#
      • 1...Rb5
        • 2.Bd4#
        • 2.Rxf5#
      • 1...Rc5
        • 2.Bd4#
        • 2.Rxf5#
      • 1...Ke6!
    • 1.Qa1+?
      • 1...Rd4+
        • 2.Qxd4#
      • 1...Ke6!
    • 1.Qf1?
      • 1...Rd4+
        • 2.Bxd4#
      • 1...Rb5
        • 2.Bd4#
        • 2.Rxf5#
      • 1...Rc5
        • 2.Bd4#
        • 2.Rxf5#
      • 1...Sa6
        • 2.Sd7#
      • 1...Sc6
        • 2.Sd7#
      • 1...Sd7
        • 2.Sxd7#
      • 1...Ke6!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxf5#
      • 1...Rd4+
        • 2.Bxd4#
      • 1...Ke6
        • 2.Re4#
      • 1...fxg4
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(h);N_GUARD::S(G)
    • S(h);N_GUARD::S(G),XS(h)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XR(c)
      • Vars
        • R(c);CHECK,N_GUARD::B(D),XR(c)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(c)
    • Try
      • Q(A);CHECK
      • Vars
        • R(c);CHECK,N_GUARD,P_SPINR(c)::QAB1(A),XR(c)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(c)
    • Try
      • Q(A);
      • Vars
        • R(c);CHECK,N_GUARD::B(D),XR(c)
        • S(h);N_GUARD::S(G)
        • S(h);N_GUARD::S(G),XS(h)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(c)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(e)
    • Vars
      • R(c);CHECK,N_GUARD::B(D),XR(c)
      • K(d);P-FLIGHT,P_SPINP(e),P_SPINR(c)::R(F)
      • P(e);XQ(A)::S(G),XP(e)
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