MESON Chess Problem Database

Problem Display
PID: 22768 (4B3/6B1/8/3P1kp1/1n5R/8/2P1K2n/3Q4 w - - 0 1)

White, Alain Campbell

Les Tours de Force sur l'Echiquier, 1906

4B3/6B1/8/3P1kp1/1n5R/8/2P1K2n/3Q4

#2

7 + 4

2794 Terms & Themes of Chess Problems 1907

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qxf1#
    • 1...Sa2
      • 2.Qd3#
    • 1...Sxc2
      • 2.Qxc2#
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sxd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd3#
    • 1...Sc6
      • 2.Qd3#
  • Tries
    • 1.Qf1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sxf1!
    • 1.Qd4?
      • threat
        • 2.Qe5#
        • 2.Qf6#
        • 2.Qe4#
      • 1...Sxd5
        • 2.Qe5#
        • 2.Qe4#
        • 2.Qxd5#
      • 1...g4
        • 2.Rh5#
        • 2.Qe5#
      • 1...Sf3
        • 2.Qf6#
        • 2.Qe4#
        • 2.Qg4#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Sd3
        • 2.Qf6#
        • 2.Qxd3#
        • 2.Qe4#
      • 1...Sc6
        • 2.Qf6#
        • 2.Qd3#
        • 2.Qe4#
      • 1...gxh4!
  • Keys
    • 1.Ke3!
      • 1...Sf1+
        • 2.Qxf1#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Sxc2+
        • 2.Qxc2#
      • 1...Sxd5+
        • 2.Qxd5#
      • 1...gxh4
        • 2.Qh5#
      • 1...g4
        • 2.Rh5#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sa2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa6
        • 2.Qd3#
      • 1...Sc6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR(A),XS(a)
    • S(b);N_GUARD::QAB(A)
    • S(b);N_GUARD::QAB(A),XS(b)
    • S(b);OGATE,XP(E)::QAR2(A),XS(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • P(d);XR(D)
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • S(a);CHECK,N_GUARD::QAR(A),XS(a)
      • S(a);CHECK,N_GUARD::QAB1(A),XS(a)
      • S(b);CHECK,OGATE,XP(B)::QAB(A),XS(b)
      • S(b);CHECK,OGATE,XP(E)::QAR2(A),XS(b)
      • P(d);OGATEB,XR(D)::QAR2(A)
      • P(d);OGATEB::R(D)
      • S(a);N_GUARD::QAR2(A),XS(a)
      • S(b);N_GUARD::QAB(A)
      • S(b);N_GUARD::QAB(A),XS(b)
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