MESON Chess Problem Database

Problem Display
PID: 81560 (8/2R2Kn1/pn1p4/3k4/5P2/8/P4B2/1Q3b2 w - - 0 1)

Allison, Christopher John

The Field, 1952

(First published on Sat Mar 15 1952)

8/2R2Kn1/pn1p4/3k4/5P2/8/P4B2/1Q3b2

#2

6 + 6

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bh3
      • 2.Qd3#
    • 1...Bc4
      • 2.Qh1#
    • 1...Bb5
      • 2.Qh1#
    • 1...Sa4
      • 2.Qb7#
    • 1...Sc4
      • 2.Qb7#
    • 1...Sd7
      • 2.Qb7#
    • 1...Sa8
      • 2.Qb7#
    • 1...Sc8
      • 2.Qb7#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
    • 1...Se6
      • 2.Qf5#
    • 1...Se8
      • 2.Qf5#
  • Tries
    • 1.Qd1+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Ke4!
    • 1.Qxf1?
      • threat
        • 2.Qg2#
        • 2.Qd3#
        • 2.Qh1#
      • 1...Sf5
        • 2.Qg2#
        • 2.Qh1#
      • 1...Se6
        • 2.Qg2#
        • 2.Qh1#
      • 1...Ke4!
    • 1.Qb3+?
      • 1...Bc4
        • 2.Qf3#
      • 1...Sc4
        • 2.Qf3#
        • 2.Qb7#
      • 1...Ke4!
    • 1.Qxb6?
      • threat
        • 2.Qd4#
        • 2.Qc6#
        • 2.Qb7#
      • 1...Bb5
        • 2.Qd4#
      • 1...Sf5
        • 2.Qc6#
        • 2.Qb7#
      • 1...Se6
        • 2.Qc6#
        • 2.Qb7#
      • 1...Ke4!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qe4#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Bxc4
        • 2.Qh1#
      • 1...Sxc4
        • 2.Qb7#
      • 1...Bg2
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • B(a);N_GUARD::QAR2(A)
    • B(a);N_GUARD::QAR2(A),XB(a)
    • B(a);OGATE::QAB(A)
    • S(d);OGATE::QAB(A)
    • S(f);N_GUARD::QAR2(A),XS(f)
    • S(f);N_GUARD::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(A),XB(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);XB(a)
      • Threat
        • DUALS(3)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);XS(d)
      • Threat
        • DUALS(3)
      • Vars
        • B(a);::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(A)
      • B(a);OGATE,SBLOCK,XR(E)::QAB(A)
      • S(d);OGATE,SBLOCK,XR(E)::QAB(A)
      • B(a);N_GUARD::QAR2(A)
      • B(a);N_GUARD::QAR2(A),XB(a)
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