MESON Chess Problem Database

Problem Display
PID: 662 (1R1Q4/1n2B3/3R4/1n1p4/pk6/bN2p3/1pP1p3/1N2K3 w - - 0 1)

Mansfield, Comins

3rd Prize=, British Chess Magazine, 1922

1R1Q4/1n2B3/3R4/1n1p4/pk6/bN2p3/1pP1p3/1N2K3

#2

8 + 9

3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Rc6#
    • 1...Sxd8
      • 2.Rc6#
    • 1...d4
      • 2.Rxd4#
  • Tries
    • 1.Rc6+?
      • 1...S5d6
        • 2.Rxb7#
        • 2.Qa5#
        • 2.Qb6#
      • 1...S7d6
        • 2.Bxd6#
        • 2.Qa5#
        • 2.Qxd6#
      • 1...Sc5!
    • 1.Qa5+?
      • 1...Sxa5
        • 2.Rc6#
      • 1...Kc4!
  • Keys
    • 1.Sa5!
      • 1...Kc5
        • 2.Rxd5#
      • 1...S5xd6
        • 2.Qb6#
      • 1...Sxa5
        • 2.Rc6#
      • 1...S7xd6
        • 2.Bxd6#
      • 1...Sxd8
        • 2.Ra6#
      • 1...Sc3
        • 2.Rxd5#
      • 1...Sd4
        • 2.Rxd5#
      • 1...Sa7
        • 2.Rxd5#
      • 1...Sc7
        • 2.Rxd5#
      • 1...Sc5
        • 2.c3#
      • 1...d4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(i);N_GUARD,P_SPINS(g)::B(F)+R(E)
    • S(i);N_GUARD,P_SPINS(g),XQ(H)::B(F)+R(E)
    • P(h);OGATE::B(F)+R(E),DCHECK,XP(h)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • S(i);P_SPINS(g)
    • Try
      • Q(H);CHECK
      • Vars
        • S(i);P_SPINS(g),XQ(H)::B(F)+R(E)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(f);S_FLIGHT::B(F)+R(E),DCHECK,XP(h)
      • S(g);OGATEB,P_SPINS(g),XR(E)::QAR2(H)
      • S(i);N_GUARD,P_SPINS(g),XS(D)::B(F)+R(E)
      • S(i);OGATE,P_SPINS(g),XR(E)::B(F),XS(i)
      • S(i);N_GUARD,P_SPINS(g),XQ(H)::B(F)+R(E)
      • S(g);N_GUARD,P_SPINS(i)::B(F)+R(E),XP(h)
      • S(i);P_SPINS(g),SBLOCK::P(C)
      • P(h);OGATE::B(F)+R(E),DCHECK,XP(h)
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