MESON Chess Problem Database

Problem Display
PID: 57539 (1r2R2q/Bbp1N3/5p2/R7/1p2k2n/rN4P1/1p2P2p/2b2Q1K w - - 0 1)

Marshall, Burney Means

The Chess Review, 1936

1r2R2q/Bbp1N3/5p2/R7/1p2k2n/rN4P1/1p2P2p/2b2Q1K

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Sc8#
    • 1...Bd2
      • 2.Sxd2#
      • 2.Qb1#
    • 1...Be3
      • 2.Qb1#
    • 1...Bf4
      • 2.Qb1#
      • 2.Qxf4#
    • 1...Bg5
      • 2.Qb1#
    • 1...Bh6
      • 2.Qb1#
    • 1...Sg2
      • 2.Qxg2#
      • 2.Qf3#
      • 2.Qf5#
    • 1...Sf3
      • 2.Qxf3#
      • 2.exf3#
    • 1...Sf5
      • 2.Qg2#
      • 2.Qf3#
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qg2#
      • 2.Qf3#
      • 2.Qf5#
  • Tries
    • 1.Sd5+?
      • 1...Qxe8
        • 2.Sxf6#
      • 1...Rxe8!
    • 1.Qg2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sxg2!
  • Keys
    • 1.Be3!
      • threat
        • 2.Qf4#
      • 1...Kxe3+
        • 2.Sd5#
      • 1...Bxe3
        • 2.Qb1#
      • 1...Qh6
        • 2.Sc8#
      • 1...Sg2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sg6
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(l);N_GUARD::R(I)+S(H)
    • B(a);OGATE::QAB(A)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • Q(l);XR(I)::S(H),XP(h)
      • Refutation
        • R(k);XR(I)
    • Try
      • Q(A);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAB1(A),XS(g)
      • Refutation
        • S(g);XQ(A)
  • Actual
    • B(G);
    • Threat
      • QAR1(A)
    • Vars
      • K(f);CHECK,P-FLIGHT,XB(G)::R(I)+S(H),DCHECK
      • B(a);OGATE,SBLOCK,XB(G)::QAB(A)
      • Q(l);N_GUARD::R(I)+S(H)
      • S(g);N_GUARD::QAB1(A)
      • S(g);N_GUARD::QAB1(A),XS(g)
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