MESON Chess Problem Database

Problem Display
PID: 136602 (4K3/5p2/5R1n/8/7N/2BPk2p/Q7/1B2q1n1 w - - 0 1)

Langham, G

The Field, 1920

(First published on Sat Jan 10 1920)

4K3/5p2/5R1n/8/7N/2BPk2p/Q7/1B2q1n1

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Qxd2#
    • 1...Qf2
      • 2.Qxf2#
    • 1...Qxc3
      • 2.Qf2#
    • 1...Qg3
      • 2.Qd2#
    • 1...Qxh4
      • 2.Qd2#
    • 1...Qxb1
      • 2.Qd2#
    • 1...Qc1
      • 2.Qf2#
    • 1...Qd1
      • 2.Qf2#
    • 1...Qf1
      • 2.Qd2#
    • 1...Qe2
      • 2.Qa7#
    • 1...Se2
      • 2.Rf3#
    • 1...Sf3
      • 2.Rxf3#
    • 1...h2
      • 2.Sg2#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Bd4#
      • 1...Qxc3
        • 2.Qf2#
      • 1...Qxh4
        • 2.Qd2#
      • 1...Qxb1
        • 2.Qd2#
      • 1...Qd2
        • 2.Qxd2#
      • 1...Se2
        • 2.Rf3#
      • 1...Sf3
        • 2.Rxf3#
      • 1...Sf5!
  • Keys
    • 1.Rf1!
      • 1...Qxc3
        • 2.Qf2#
      • 1...Qxh4
        • 2.Qd2#
      • 1...Qxb1
        • 2.Qd2#
      • 1...Qxf1
        • 2.Qd2#
      • 1...Qd2
        • 2.Qxd2#
      • 1...Qf2
        • 2.Qxf2#
      • 1...Sf3
        • 2.Rxf3#
      • 1...Sg4
        • 2.Sf5#
      • 1...Qg3
        • 2.Qd2#
      • 1...Qc1
        • 2.Qf2#
      • 1...Qd1
        • 2.Qf2#
      • 1...Qe2
        • 2.Qa7#
      • 1...Se2
        • 2.Rf3#
      • 1...Sf5
        • 2.Sxf5#
      • 1...Sg8
        • 2.Sf5#
      • 1...h2
        • 2.Sg2#
      • 1...f5
        • 2.Qe6#
      • 1...f6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD::QAB1(B),XQ(a)
    • Q(a);N_GUARD,XB(C)::QAB1(B)
    • Q(a);N_GUARD::QAB1(B)
    • Q(a);N_GUARD,XS(E)::QAB1(B)
    • Q(a);N_GUARD,XB(A)::QAB1(B)
    • Q(a);SBLOCK::QAB(B)
    • S(b);N_GUARD::R1(F)
    • S(b);N_GUARD::R1(F),XS(b)
    • P(d);N_GUARD::S(E)
  • Tries
    • Try
      • Q(B);
      • Threat
        • B(C)
      • Vars
        • Q(a);N_GUARD,XB(C)::QAB1(B)
        • Q(a);N_GUARD,XS(E)::QAB1(B)
        • Q(a);N_GUARD,XB(A)::QAB1(B)
        • Q(a);N_GUARD::QAB1(B),XQ(a)
        • S(b);N_GUARD::R1(F)
        • S(b);N_GUARD::R1(F),XS(b)
      • Refutation
        • S(e);
  • Actual
    • R(F);
    • Vars
      • Q(a);N_GUARD,XB(C)::QAB1(B)
      • Q(a);N_GUARD,XS(E)::QAB1(B)
      • Q(a);N_GUARD,XB(A)::QAB1(B)
      • Q(a);N_GUARD,XR(F)::QAB1(B)
      • Q(a);N_GUARD::QAB1(B),XQ(a)
      • S(b);N_GUARD::R1(F),XS(b)
      • S(e);N_GUARD::S(E)
      • Q(a);N_GUARD::QAB1(B)
      • Q(a);SBLOCK::QAB(B)
      • S(b);N_GUARD::R1(F)
      • S(e);N_GUARD::S(E),XS(e)
      • P(d);N_GUARD::S(E)
      • P(f);N_GUARD::QAR(B)
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