MESON Chess Problem Database

Problem Display
PID: 11434 (5Q2/8/B7/R7/1B1p4/1kb3rR/1p1P2p1/1n1nN1K1 w - - 0 1)

Mansfield, Comins

The Problemist, 1938

5Q2/8/B7/R7/1B1p4/1kb3rR/1p1P2p1/1n1nN1K1

#2

8 + 8

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb4
      • 2.Qf7#
      • 2.Qg8#
    • 1...Sxd2
      • 2.Ra3#
    • 1...Sa3
      • 2.Rxa3#
  • Tries
    • 1.Bxc3?
      • threat
        • 2.Qb4#
        • 2.Qf7#
        • 2.Qb8#
      • 1...Rxc3
        • 2.Qb8#
      • 1...Sxd2
        • 2.Ra3#
        • 2.Qa3#
        • 2.Qb4#
      • 1...Sbxc3
        • 2.Ra3#
        • 2.Qa3#
      • 1...dxc3
        • 2.Qb8#
      • 1...Sa3
        • 2.Rxa3#
        • 2.Qxa3#
      • 1...Re3
        • 2.Qb4#
        • 2.Qb8#
      • 1...Rf3
        • 2.Qb4#
        • 2.Qb8#
      • 1...Rg5
        • 2.Qb4#
      • 1...Rg6
        • 2.Qb4#
      • 1...Rg7
        • 2.Qb4#
      • 1...Rg8
        • 2.Qb4#
        • 2.Qf7#
        • 2.Qxg8#
      • 1...Se3
        • 2.Qb4#
        • 2.Qb8#
      • 1...Sdxc3!
    • 1.Qc5?
      • threat
        • 2.Bc4#
        • 2.Qc4#
      • 1...Sxd2
        • 2.Ra3#
      • 1...Sa3
        • 2.Rxa3#
      • 1...Se3!
    • 1.Qe8?
      • threat
        • 2.Qa4#
      • 1...Kxb4
        • 2.Qa4#
        • 2.Qb5#
      • 1...Sa3!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Bxc3#
      • 1...Bxd2
        • 2.Bxd2#
      • 1...Bxb4
        • 2.Qg8#
      • 1...Sxd2
        • 2.Ra3#
      • 1...Sa3
        • 2.Rxa3#
      • 1...Rg5
        • 2.Bc5#
      • 1...Rg6
        • 2.Bd6#
      • 1...Rg7
        • 2.Be7#
      • 1...Rg8
        • 2.Bf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,XP(C)::R1(F)
    • S(a);N_GUARD::R1(F),XS(a)
  • Tries
    • Try
      • B(E);XB(f)
      • Threat
        • DUALS(3)
      • Vars
        • R(g);P_SPINR(g),XB(E)::QAR(H)
        • P(h);XB(E)::QAR(H)
        • R(g);::QAR1(H)
      • Refutation
        • S(b);XB(E)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD,XP(C)::R1(F)
        • S(a);N_GUARD::R1(F),XS(a)
      • Refutation
        • S(b);
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Refutation
        • S(a);
  • Actual
    • Q(H);
    • Threat
      • QAR(H)+B(E),XB(f)
    • Vars
      • B(f);OGATE,P_SPINR(g),XP(C)::QAR(H)+B(E),XB(f)
      • B(f);P_SPINB(f),P_SPINR(g),SBLOCK,XB(E)::QAB(H)
      • S(a);N_GUARD,XP(C)::R1(F)
      • S(a);N_GUARD::R1(F),XS(a)
      • R(g);P_SPINB(f)::QAR(H)+B(E)
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