MESON Chess Problem Database

Problem Display
PID: 63578 (1r3n2/RRbP1K2/2k1N3/p2np3/p1N5/B7/3Q4/8 w - - 0 1)

McFarlane, John D

Chess Amateur (The), 1909

1r3n2/RRbP1K2/2k1N3/p2np3/p1N5/B7/3Q4/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd7
      • 2.Rxc7#
    • 1...Bd6
      • 2.Sxa5#
    • 1...Bd8
      • 2.Sxe5#
  • Tries
    • 1.Sxa5+?
      • 1...Kxd7
        • 2.Rxc7#
      • 1...Bxa5!
    • 1.Rb5?
      • threat
        • 2.Qxd5#
      • 1...Kxb5
        • 2.Qxd5#
      • 1...Kxd7
        • 2.Rxc7#
      • 1...Sc3
        • 2.Rc5#
      • 1...Se3
        • 2.Rc5#
      • 1...Sb4
        • 2.Rc5#
      • 1...Sf4
        • 2.Rc5#
      • 1...Sb6
        • 2.Rc5#
      • 1...Sf6
        • 2.Rc5#
      • 1...Se7
        • 2.Rc5#
      • 1...Rxb5!
    • 1.Rxc7+?
      • 1...Kb5
        • 2.Rxa5#
        • 2.Rc5#
        • 2.Qxa5#
        • 2.Qxd5#
      • 1...Sxc7!
    • 1.d8S+?
      • 1...Kd7
        • 2.Sb6#
        • 2.Rxc7#
      • 1...Bxd8
        • 2.Sxe5#
      • 1...Rxd8!
  • Keys
    • 1.Rxa5!
      • threat
        • 2.Qxd5#
      • 1...Kxb7
        • 2.Qxd5#
      • 1...Kxd7
        • 2.Rxc7#
      • 1...Bxa5
        • 2.Sxa5#
      • 1...Sc3
        • 2.Rxc7#
      • 1...Se3
        • 2.Rxc7#
      • 1...Sb4
        • 2.Rxc7#
      • 1...Sf4
        • 2.Rxc7#
      • 1...Sb6
        • 2.Rxc7#
      • 1...Sf6
        • 2.Rxc7#
      • 1...Se7
        • 2.Rxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • K(e);P_SPINB(f),P_SPINS(c),S_FLIGHT,XP(G)::R1(F),XB(f)
    • B(f);N_GUARD::S(C),XP(b)
    • B(f);N_GUARD::S(C),XP(d)
  • Tries
    • Try
      • S(C);CHECK,XP(b)
      • Vars
        • K(e);P_SPINB(f),P_SPINS(c),S_FLIGHT,XP(G)::R1(F),XB(f)
      • Refutation
        • B(f);XS(C)
    • Try
      • R(F);
      • Threat
        • QAB1(A),XS(c)
      • Vars
        • K(e);S_FLIGHT,XR(F)::QAR2(A),XS(c)
        • K(e);P_SPINB(f),P_SPINS(c),S_FLIGHT,XP(G)::R1(E),XB(f)
        • S(c);::R1(F)
      • Refutation
        • R(g);XR(F)
    • Try
      • R(F);CHECK,XB(f)
      • Refutation
        • S(c);XR(F)
    • Try
      • P(G);CHECK
      • Vars
        • B(f);XS(G)::S(C),XP(d)
      • Refutation
        • R(g);XS(G)
  • Actual
    • R(E);XP(b)
    • Threat
      • QAB1(A),XS(c)
    • Vars
      • K(e);S_FLIGHT,XR(F)::QAB(A),XS(c)
      • K(e);P_SPINB(f),P_SPINS(c),S_FLIGHT,XP(G)::R1(F),XB(f)
      • B(f);XR(E)::S(C),XB(f)
      • S(c);N_GUARD::R1(F),XB(f)
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