MESON Chess Problem Database

Problem Display
PID: 6227 (8/1r1p4/1p1P4/5QpK/2k3NR/PN5R/1P6/2rqn3 w - - 0 1)

Mansfield, Comins

Brixton Free Press, 1928

8/1r1p4/1p1P4/5QpK/2k3NR/PN5R/1P6/2rqn3

#2

9 + 8

3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Se3#
    • 1...Qxg4+
      • 2.Rxg4#
    • 1...Ra1
      • 2.Rc3#
    • 1...Rb1
      • 2.Rc3#
    • 1...Rc3
      • 2.Rxc3#
    • 1...Sc2
      • 2.Rc3#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Sd2+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Qxd2!
    • 1.Sa5+?
      • 1...Kd4
        • 2.Qe5#
      • 1...bxa5!
  • Keys
    • 1.a4!
      • threat
        • 2.Qb5#
      • 1...Qxg4+
        • 2.Rxg4#
      • 1...Kb4
        • 2.Qb5#
      • 1...Qxb3
        • 2.Se3#
      • 1...Qd5
        • 2.Se5#
      • 1...b5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_PINS(E),SBLOCK,XS(C)::R(F)+S(E),DCHECK
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::R(F),XQ(b)
    • R(a);N_GUARD::R1(D)
    • R(a);N_GUARD::R1(D),XR(a)
    • S(c);S_CUTR(a)::R1(D)
    • P(f);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(G)
      • Refutation
        • Q(b);N_PINS(E),XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(G)
      • Refutation
        • P(f);XS(C)
  • Actual
    • P(B);
    • Threat
      • QAB1(G)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::R(F),XQ(b)
      • K(d);P-FLIGHT::QAR1(G)
      • Q(b);N_PINS(E),SBLOCK,XS(C)::R(F)+S(E),DCHECK
      • Q(b);N_PINS(E),SBLOCK::R(F)+S(E),DCHECK
      • P(f);N_GUARD::QAR1(G)
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