MESON Chess Problem Database

Problem Display
PID: 66091 (1b6/pQn4p/P1N1p2P/R1P1P3/2NPk1p1/pn2B1p1/B1P3K1/8 w - - 0 1)

Anonymous

The Chess Monthly (Hoffer), 1881

1b6/pQn4p/P1N1p2P/R1P1P3/2NPk1p1/pn2B1p1/B1P3K1/8

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Se7#
    • 1...Sb5
      • 2.Se7#
    • 1...Sd5
      • 2.Qxh7#
    • 1...Sxa6
      • 2.Se7#
    • 1...Sa8
      • 2.Se7#
    • 1...Se8
      • 2.Se7#
  • Tries
    • 1.Sd6+?
      • 1...Kd5
        • 2.Sb4#
        • 2.Sxa7#
        • 2.Se7#
        • 2.Sxb8#
        • 2.Sd8#
        • 2.Bxb3#
        • 2.c4#
      • 1...Kxe3!
    • 1.Sb4+?
      • 1...Sd5
        • 2.Qxh7#
      • 1...Kf5!
    • 1.Sxa7+?
      • 1...Sd5
        • 2.Qxh7#
      • 1...Kf5!
    • 1.Sxb8+?
      • 1...Sd5
        • 2.Qxh7#
      • 1...Kf5!
    • 1.Sd8+?
      • 1...Sd5
        • 2.Qxh7#
      • 1...Kf5!
    • 1.Bxb3?
      • 1...Kd5
        • 2.Sd2#
        • 2.Sd6#
        • 2.Sb4#
        • 2.Sxa7#
        • 2.Se7#
        • 2.Sxb8#
        • 2.Sd8#
      • 1...Kf5
        • 2.Se7#
      • 1...Sxa6
        • 2.Se7#
      • 1...Sb5
        • 2.Se7#
      • 1...Sd5
        • 2.Qxh7#
      • 1...Sa8
        • 2.Se7#
      • 1...Se8
        • 2.Se7#
      • 1...a2!
  • Keys
    • 1.Rxa3!
      • 1...Kd5
        • 2.S6a5#
      • 1...Kf5
        • 2.Se7#
      • 1...Sxd4
        • 2.Sd6#
      • 1...Sxc5
        • 2.Sd6#
      • 1...Sxa6
        • 2.Se7#
      • 1...Sa1
        • 2.Sd6#
      • 1...Sc1
        • 2.Sd6#
      • 1...Sd2
        • 2.Sd6#
      • 1...Sa5
        • 2.Sd6#
      • 1...Sb5
        • 2.Se7#
      • 1...Sd5
        • 2.Qxh7#
      • 1...Sa8
        • 2.Se7#
      • 1...Se8
        • 2.Se7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::S(K)
    • S(h);N_GUARD::QAB(M)+S(K)
    • S(h);OGATE,SBLOCK::QAB(M),XP(i)
    • S(h);N_GUARD,XP(J)::QAB(M)+S(K)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(d);P-FLIGHT,XB(D)
    • Try
      • S(K);CHECK
      • Vars
        • S(h);OGATE,P_SPINS(h)::QAB(M),XP(i)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(K);CHECK,XP(g)
      • Vars
        • S(h);OGATE,P_SPINS(h),SBLOCK::QAB(M),XP(i)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(K);CHECK,XB(j)
      • Vars
        • S(h);OGATE,P_SPINS(h),SBLOCK::QAB(M),XP(i)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(K);CHECK
      • Vars
        • S(h);OGATE,P_SPINS(h),SBLOCK::QAB(M),XP(i)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(A);XS(b)
      • Vars
        • K(d);S_FLIGHT::S(K)
        • S(h);N_GUARD,XP(J)::QAB(M)+S(K)
        • S(h);N_GUARD::QAB(M)+S(K)
        • S(h);OGATE,SBLOCK::QAB(M),XP(i)
      • Refutation
        • P(a);
  • Actual
    • R(G);XP(a)
    • Vars
      • K(d);S_FLIGHT::QAB(M)+S(K)
      • K(d);S_FLIGHT::S(K)
      • S(b);XP(F)::S(E)
      • S(b);XP(H)::S(E)
      • S(h);N_GUARD,XP(J)::QAB(M)+S(K)
      • S(b);::S(E)
      • S(h);N_GUARD::QAB(M)+S(K)
      • S(h);OGATE,SBLOCK::QAB(M),XP(i)
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