MESON Chess Problem Database

Problem Display
PID: 125488 (4q3/1PQ1p3/4p2n/3R3n/b5N1/K1P3R1/8/7k w - - 0 1)

Cook, Eugene Beauharnais

Checkmate, 1901

4q3/1PQ1p3/4p2n/3R3n/b5N1/K1P3R1/8/7k

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Rxh5#
    • 1...Qd7
      • 2.Rxh5#
    • 1...Qa8
      • 2.Rxh5#
    • 1...Qb8
      • 2.Rxh5#
    • 1...Qc8
      • 2.Rxh5#
    • 1...Qd8
      • 2.Rxh5#
    • 1...Qf8
      • 2.Rxh5#
    • 1...Qg8
      • 2.Rxh5#
    • 1...Qh8
      • 2.Rxh5#
    • 1...Bd1
      • 2.Rxd1#
    • 1...Bc6
      • 2.Rd1#
    • 1...Bd7
      • 2.Rd1#
    • 1...Sf7
      • 2.Rxh5#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Rg1#
        • 2.Qg1#
      • 1...Sxg4
        • 2.Qg1#
      • 1...Sxg3!
    • 1.Qc5?
      • threat
        • 2.Rg1#
        • 2.Qg1#
      • 1...Sxg4
        • 2.Qg1#
      • 1...Sxg3!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Rd1#
        • 2.Rxh5#
      • 1...Qxc6
        • 2.Rxh5#
      • 1...Bxc6
        • 2.Rd1#
      • 1...Sxg3
        • 2.Rd1#
      • 1...Sxg4
        • 2.Rxh5#
      • 1...exd5
        • 2.Qxd5#
      • 1...Bd1
        • 2.Rxd1#
        • 2.Rxh5#
      • 1...Sf4
        • 2.Rd1#
        • 2.Rh5#
      • 1...Sf6
        • 2.Rd1#
        • 2.Rh5#
      • 1...Sg7
        • 2.Rd1#
        • 2.Rh5#
      • 1...Sf5
        • 2.Rd1#
      • 1...e5
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 11
  • Sets
    • Q(g);N_GUARD::R(E),XS(c)
    • B(b);N_GUARD::R(E),XB(b)
    • B(b);N_GUARD::R(E)
    • S(e);S_CUTQ(g)::R(E),XS(c)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);XS(D)::QAR1(G)
      • Refutation
        • S(c);XR(C)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);XS(D)::QAR1(G)
      • Refutation
        • S(c);XR(C)
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(g);XQ(G)::R(E),XS(c)
      • B(b);XQ(G)::R(E)
      • S(c);XR(C)::QAB(G)+R(E),DCHECK
      • S(e);XS(D)::QAB(G)+R(E),DCHECK,XS(c)
      • P(d);OGATE,P_SPINP(d),XR(E)::QAB(G),XP(d)
      • S(e);::QAB(G)+R(E),DCHECK
      • P(d);::QAB(G)+R(E),DCHECK
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