MESON Chess Problem Database

Problem Display
PID: 109844 (8/2Q1pK2/7b/1P6/1qR5/1PP1Np2/3kNBp1/1B2R1r1 w - - 0 1)

Barry, Henry William

Checkmate, 1901

8/2Q1pK2/7b/1P6/1qR5/1PP1Np2/3kNBp1/1B2R1r1

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Rd4#
    • 1...Qa5
      • 2.Rd4#
      • 2.Qd7#
    • 1...Qxb3
      • 2.Qd8#
      • 2.Qd7#
    • 1...Qa4
      • 2.Qd8#
      • 2.Qd7#
    • 1...Qxc4+
      • 2.Sxc4#
  • Tries
    • 1.Sxg1?
      • threat
        • 2.Sxf3#
        • 2.Rd1#
      • 1...Qxb3
        • 2.Sxf3#
        • 2.Qd8#
        • 2.Qd7#
      • 1...Bxe3
        • 2.Sxf3#
      • 1...Qxc4+!
    • 1.Qa7?
      • threat
        • 2.Qd4#
        • 2.Qa2#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxb3
        • 2.Qd4#
        • 2.Qd7#
      • 1...Rxe1
        • 2.Qa2#
      • 1...Bxe3
        • 2.Qxe3#
        • 2.Qa2#
      • 1...Qa3
        • 2.Rd4#
        • 2.Qd4#
      • 1...Qa5
        • 2.Rd4#
        • 2.Qd4#
        • 2.Qd7#
      • 1...Qc5
        • 2.Qa2#
      • 1...Qd6
        • 2.Qa2#
      • 1...Qa4
        • 2.Qd4#
        • 2.Qd7#
      • 1...Bg7
        • 2.Qa2#
      • 1...e5
        • 2.Qa2#
      • 1...Qxc3!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qa2#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxc3
        • 2.Rd4#
        • 2.Qxc3#
      • 1...Qxa5
        • 2.Rd4#
      • 1...Qxb3
        • 2.Qd8#
      • 1...Qa3
        • 2.Rd4#
      • 1...Qa4
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(e);N_GUARD::R(H)
    • Q(e);CHECK,XR(H)::S(G),XQ(e)
  • Tries
    • Try
      • S(C);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XS(G)::S(C),XP(d)
      • Refutation
        • Q(e);CHECK,XR(H)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);CHECK,XR(H)::S(G),XQ(e)
        • R(a);XR(B)::QAR(J)
        • Q(e);::QAR(J)
        • B(f);::QAR(J)
        • P(g);::QAR(J)
      • Refutation
        • Q(e);XP(F)
  • Actual
    • Q(J);
    • Threat
      • QAR(J)
    • Vars
      • Q(e);CHECK,XR(H)::S(G),XQ(e)
      • Q(e);N_GUARD,XQ(J)::R(H)
      • Q(e);N_GUARD,P_PINR(H),XP(E)::QAR(J)
      • Q(e);N_GUARD::R(H)
      • Q(e);N_GUARD::QAR(J)
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