MESON Chess Problem Database

Problem Display
PID: 16538 (nK6/1P6/r2R4/1npPkN2/6Q1/3p4/1R2P3/B7 w - - 0 1)

Mansfield, Comins

Chess, 1941

nK6/1P6/r2R4/1npPkN2/6Q1/3p4/1R2P3/B7

#2

9 + 6

3550 Complete Mansfield/II 1997
4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Rxb5#
    • 1...Rc6
      • 2.Rxb5#
    • 1...Sa3
      • 2.Rb1#
      • 2.Ra2#
      • 2.Rc2#
      • 2.Rd2#
      • 2.Rb3#
      • 2.Rb4#
      • 2.Rb5#
      • 2.Rbb6#
    • 1...Sa7
      • 2.Ra2#
    • 1...Sbc7
      • 2.Ra2#
    • 1...dxe2
      • 2.Rxe2#
  • Tries
    • 1.Ra2+?
      • 1...Sc3
        • 2.Bxc3#
      • 1...Sd4!
    • 1.Rb4+?
      • 1...Rxa1
        • 2.Re4#
        • 2.Qe4#
        • 2.Qf4#
      • 1...Sc3
        • 2.Bxc3#
        • 2.Re4#
        • 2.Qe4#
        • 2.Qf4#
      • 1...Sd4!
    • 1.Re6+?
      • 1...Kxd5
        • 2.Se3#
        • 2.Se7#
        • 2.Qe4#
      • 1...Rxe6!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sc4#
      • 1...Kxd6
        • 2.Qe6#
      • 1...Rxd6
        • 2.Rxb5#
      • 1...Sxd6
        • 2.Ra2#
      • 1...Ra4
        • 2.Re6#
      • 1...Sa3
        • 2.Rbb6#
      • 1...Sb6
        • 2.Re6#
      • 1...c4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(e);N_GUARD,P_PINP(H)::B(A)+R(B),XS(b)
    • R(e);N_GUARD::B(A)+R(B),XS(b)
    • S(b);N_GUARD::B(A)+R(B)
    • P(a);OGATE,XP(C)::B(A)+R(B),DCHECK,XP(a)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::B(A),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • R(B);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • R(G);CHECK
      • Refutation
        • R(e);XR(G)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);S_FLIGHT,XR(G)::QAR1(D)
      • R(e);N_GUARD,SBLOCK,XR(G)::B(A)+R(B),XS(b)
      • S(b);N_GUARD,SBLOCK,XR(G)::B(A)+R(B)
      • R(e);N_GUARD::R1(G)
      • S(b);OGATE::B(A)+R(B)
      • S(f);S_CUTR(e)::R1(G)
      • P(c);::S(F),XP(c)
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