MESON Chess Problem Database

Problem Display
PID: 142268 (8/4p3/4N1K1/5NP1/4k2p/1B3RqP/1Q6/6n1 w - - 0 1)

Lane, Henry Fitzgerald William

Western Daily Mercury, 1912

(First published on Fri Jan 19 1912)

8/4p3/4N1K1/5NP1/4k2p/1B3RqP/1Q6/6n1

#2

8 + 5

14867 BCPS Library 2011
3713 Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf3
      • 2.Bd5#
    • 1...Qh2
      • 2.Re3#
    • 1...Qe5
      • 2.Re3#
    • 1...Qd6
      • 2.Re3#
    • 1...Qc7
      • 2.Re3#
    • 1...Qb8
      • 2.Re3#
    • 1...Qg2
      • 2.Re3#
    • 1...Qxf3
      • 2.Qd4#
    • 1...Qg4
      • 2.Re3#
    • 1...Qxg5+
      • 2.Sxg5#
    • 1...Se2
      • 2.Qxe2#
    • 1...Sxf3
      • 2.Qe2#
    • 1...Sxh3
      • 2.Qe2#
  • Tries
    • 1.Bc4?
      • 1...Qxg5+
        • 2.Sxg5#
      • 1...Kxf3
        • 2.Bd5#
      • 1...Qxf3
        • 2.Qd4#
      • 1...Qxh3
        • 2.Rf4#
      • 1...Sxf3
        • 2.Qe2#
      • 1...Sxh3
        • 2.Qe2#
      • 1...Qe1
        • 2.Rf4#
      • 1...Qh2
        • 2.Re3#
      • 1...Qf4
        • 2.Rxf4#
      • 1...Qe5
        • 2.Re3#
      • 1...Qd6
        • 2.Re3#
      • 1...Qc7
        • 2.Re3#
      • 1...Qb8
        • 2.Re3#
      • 1...Qg2
        • 2.Re3#
        • 2.Rf4#
      • 1...Qg4
        • 2.Re3#
      • 1...Se2
        • 2.Qxe2#
      • 1...Qf2!
    • 1.Rxg3?
      • threat
        • 2.Re3#
        • 2.Qd4#
      • 1...Sf3
        • 2.Qe2#
      • 1...Se2
        • 2.Re3#
        • 2.Qxe2#
      • 1...hxg3!
    • 1.Rf4+?
      • 1...Kd3
        • 2.Sc5#
        • 2.Bc4#
        • 2.Rd4#
        • 2.Qc2#
      • 1...Qxf4!
    • 1.Qc3?
      • threat
        • 2.Sc5#
        • 2.Qe3#
      • 1...Qxg5+
        • 2.Sxg5#
      • 1...Qxf3
        • 2.Qd4#
      • 1...Sxf3
        • 2.Qe3#
      • 1...Qe1
        • 2.Sc5#
        • 2.Rf4#
      • 1...Qf4
        • 2.Sc5#
        • 2.Rxf4#
      • 1...Qe5
        • 2.Re3#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Qd6
        • 2.Re3#
        • 2.Qe3#
      • 1...Qc7
        • 2.Re3#
        • 2.Qe3#
      • 1...Qf2!
    • 1.Qc2+?
      • 1...Kxf3
        • 2.Bd5#
      • 1...Ke5!
    • 1.Qd2?
      • threat
        • 2.Qe3#
        • 2.Qd5#
      • 1...Kxf3
        • 2.Bd5#
      • 1...Ke5
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qd5#
      • 1...Qxf3
        • 2.Qd4#
        • 2.Qd5#
      • 1...Qf2
        • 2.Qf4#
        • 2.Qd5#
      • 1...Qe1
        • 2.Qf4#
        • 2.Qd5#
      • 1...Qf4
        • 2.Qxf4#
        • 2.Qd5#
      • 1...Qe5
        • 2.Re3#
        • 2.Qe3#
        • 2.Qd3#
      • 1...Qd6
        • 2.Re3#
        • 2.Qe3#
      • 1...Qxg5+!
  • Keys
    • 1.Qh2!
      • 1...Qxg5+
        • 2.Sxg5#
      • 1...Kxf3
        • 2.Bd5#
      • 1...Ke5
        • 2.Re3#
      • 1...Qxh2
        • 2.Re3#
      • 1...Qxf3
        • 2.Sc5#
      • 1...Qxh3
        • 2.Qf4#
      • 1...Sxf3
        • 2.Qe2#
      • 1...Sxh3
        • 2.Qe2#
      • 1...Qf2
        • 2.Qf4#
      • 1...Qe1
        • 2.Qf4#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qe5
        • 2.Re3#
      • 1...Qd6
        • 2.Re3#
      • 1...Qc7
        • 2.Re3#
      • 1...Qb8
        • 2.Re3#
      • 1...Qg2
        • 2.Re3#
        • 2.Qf4#
      • 1...Qg4
        • 2.Re3#
      • 1...Se2
        • 2.Qxe2#

Anticipated by 9789(1909)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT,XR(C)::B(B)
    • Q(b);N_GUARD,N_PINP(F)::R1(C)
    • Q(b);N_GUARD,N_PINP(F),P_PINS(G)::R1(C)
    • Q(b);N_GUARD::R1(C)
    • Q(b);N_PINP(F),SBLOCK,XR(C)::QAR1(A)
    • Q(b);CHECK,XP(F)::S(G),XQ(b)
    • S(a);N_GUARD::QAR2(A),XS(a)
    • S(a);N_GUARD,XR(C)::QAR2(A)
    • S(a);N_GUARD,XP(D)::QAR2(A)
  • Tries
    • Try
      • B(B);
      • Vars
        • Q(b);CHECK,XP(F)::S(G),XQ(b)
        • K(c);S_FLIGHT,XR(C)::B(B)
        • Q(b);N_PINP(F),SBLOCK,XR(C)::QAR1(A)
        • Q(b);N_GUARD,N_PINP(F),XP(D)::R1(C)
        • S(a);N_GUARD,XR(C)::QAR2(A)
        • S(a);N_GUARD,XP(D)::QAR2(A)
        • Q(b);N_GUARD,N_PINP(F)::R1(C)
        • Q(b);N_GUARD,N_PINP(F)::R1(C),XQ(b)
        • Q(b);N_GUARD,N_PINP(F),P_PINS(G)::R1(C)
        • Q(b);N_GUARD::R1(C)
        • S(a);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • Q(b);N_PINP(F)
    • Try
      • R(C);N_SPINP(F),XQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR2(A)
      • Refutation
        • P(d);XR(C)
    • Try
      • R(C);CHECK
      • Refutation
        • Q(b);N_PINP(F),XR(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,XP(F)::S(G),XQ(b)
        • Q(b);N_PINP(F),SBLOCK,XR(C)::QAR1(A)
        • S(a);XR(C)::QAR1(A)
      • Refutation
        • Q(b);N_PINP(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(C)::B(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XR(C)::B(B)
      • Refutation
        • Q(b);CHECK,XP(F)
  • Actual
    • Q(A);
    • Vars
      • Q(b);CHECK,XP(F)::S(G),XQ(b)
      • K(c);S_FLIGHT,XR(C)::B(B)
      • K(c);P-FLIGHT,P_SPINQ(b)::R(C)
      • Q(b);N_GUARD,N_PINP(F),XQ(A)::R1(C)
      • Q(b);N_PINP(F),SBLOCK,XR(C)::S(G)
      • Q(b);N_PINP(F),OGATE,XP(D)::QAR1(A)
      • S(a);N_GUARD,XR(C)::QAR2(A)
      • S(a);N_GUARD,XP(D)::QAR2(A)
      • Q(b);N_PINP(F),OGATE::QAR1(A)
      • Q(b);N_PINP(F),OGATE::QAR1(A),XQ(b)
      • Q(b);N_GUARD,N_PINP(F)::R1(C)
      • Q(b);N_GUARD,N_PINP(F),P_PINS(G)::R1(C)
      • Q(b);N_GUARD::R1(C)
      • S(a);N_GUARD::QAR2(A),XS(a)
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