MESON Chess Problem Database

Problem Display
PID: 37 (Q7/7B/1q3P2/1p1r1P2/4k1NR/3p1bP1/3PN1pP/1K2R3 w - - 0 1)

Mansfield, Comins

De Problemist, 1930

Q7/7B/1q3P2/1p1r1P2/4k1NR/3p1bP1/3PN1pP/1K2R3

#2

12 + 7

459 Nebraska Chess Bulletin 1951
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sc3#
    • 1...Qe6
      • 2.fxe6#
  • Tries
    • 1.Sf4+?
      • 1...Qe3
        • 2.Qxd5#
      • 1...Be2
        • 2.Qxd5#
      • 1...Kd4!
    • 1.Se3+?
      • 1...Bg4
        • 2.Qxd5#
      • 1...Ke5!
    • 1.Qe8+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Qe6!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sf2#
      • 1...Rxf5
        • 2.Qe5#
      • 1...Bxe2
        • 2.Se5#
      • 1...Bxg4
        • 2.Sd4#
      • 1...Rd4
        • 2.Sc3#
      • 1...Rc5
        • 2.Qd4#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rd6
        • 2.Qe5#
      • 1...Rd7
        • 2.Qe5#
      • 1...Rd8
        • 2.Qe5#
      • 1...Qf2
        • 2.Sxf2#
      • 1...Qd4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • Q(g);SBLOCK::R(B)+S(D),DCHECK
    • Q(g);OGATE::B(K)+P(I),XQ(g)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::QAB1(L),XR(f)
        • B(c);P_SPINB(c)::QAB1(L),XR(f)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • B(c);P_SPINB(c)::QAB1(L),XR(f)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT
    • Try
      • Q(L);CHECK,N_PINR(f)
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(L),XR(f)
      • Refutation
        • Q(g);P_SPINQ(g)
  • Actual
    • Q(L);N_PINR(f)
    • Threat
      • R(H)+S(G),DCHECK
    • Vars
      • R(f);N_GUARD,P_SPINR(f),XP(I)::QAR1(L)
      • B(c);N_GUARD,P_SPINB(c),XS(D)::R(H)+S(G)
      • B(c);N_GUARD,P_SPINB(c),XS(G)::R(B)+S(D)
      • R(f);SBLOCK::R(B)+S(D),DCHECK
      • R(f);N_GUARD,S_CUTQ(g)::QAR1(L)
      • R(f);N_GUARD::QAR1(L),XR(f)
      • R(f);N_GUARD::QAR1(L)
      • Q(g);::R(H)+S(G),DCHECK,XQ(g)
      • Q(g);SBLOCK::R(B)+S(D),DCHECK
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