MESON Chess Problem Database

Problem Display
PID: 135585 (nN1b4/2p5/n1R5/K2k2r1/4NP2/2R1Pb2/3P2q1/1B6 w - - 0 1)

Healey, Percy E

The Field, 1916

(First published on Sat Mar 11 1916)

nN1b4/2p5/n1R5/K2k2r1/4NP2/2R1Pb2/3P2q1/1B6

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4
      • 2.Ba2#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Sb4
      • 2.R3c5#
    • 1...Sc5
      • 2.R3xc5#
    • 1...Sxb8
      • 2.R3c5#
  • Tries
    • 1.Sxa6?
      • threat
        • 2.Sb4#
        • 2.R3c5#
      • 1...Qxd2
        • 2.Sb4#
      • 1...Be7!
    • 1.Rc1?
      • threat
        • 2.Sc3#
      • 1...Bxe4
        • 2.Ba2#
      • 1...Sxb8
        • 2.R1c5#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Sc5
        • 2.R1xc5#
      • 1...Qxd2+!
    • 1.R3c4?
      • threat
        • 2.Sc3#
        • 2.Rd4#
      • 1...Bxe4
        • 2.Rd4#
      • 1...Sxb8
        • 2.Sc3#
        • 2.R4c5#
      • 1...Sc5
        • 2.Rd4#
        • 2.R4xc5#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Qxd2+!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Sc3#
      • 1...Kxe4+
        • 2.R2c5#
      • 1...Qxd2+
        • 2.Rxd2#
      • 1...Bxe4
        • 2.Ba2#
      • 1...Sxb8
        • 2.R2c5#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Sc5
        • 2.R2xc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(b);SBLOCK,XS(E)::B(A)
    • B(h);N_GUARD::S(E),XB(h)
    • S(e);N_GUARD::R1(C)
    • S(e);N_GUARD::R1(C),XS(e)
    • S(e);N_GUARD,XS(I)::R1(C)
  • Tries
    • Try
      • S(I);XS(e)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);P_PINR(C),XP(B)::S(I)
      • Refutation
        • B(h);
    • Try
      • R(C);
      • Threat
        • S(E)
      • Vars
        • B(b);SBLOCK,XS(E)::B(A)
        • S(e);N_GUARD,XS(I)::R1(C)
        • B(h);N_GUARD::S(E),XB(h)
        • S(e);N_GUARD::R1(C),XS(e)
      • Refutation
        • Q(a);CHECK,XP(B)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);XS(E)::R1(C)
        • B(h);N_GUARD::S(E),XB(h)
      • Refutation
        • Q(a);CHECK,XP(B)
  • Actual
    • R(C);
    • Threat
      • S(E)
    • Vars
      • K(c);CHECK,S_FLIGHT,XS(E)::B(A)+R(C)
      • Q(a);CHECK,OGATE,XP(B)::R(C),XQ(a)
      • B(b);SBLOCK,XS(E)::B(A)
      • S(e);N_GUARD,XS(I)::R1(C)
      • B(h);N_GUARD::S(E),XB(h)
      • S(e);N_GUARD::R1(C),XS(e)
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