MESON Chess Problem Database

Problem Display
PID: 208877 (4R3/5n2/3PN1n1/4k3/1p6/1B3P2/8/2Q2K2 w - - 0 1)

Brown, Theodore Morris

Detroit Free Press, 1876

4R3/5n2/3PN1n1/4k3/1p6/1B3P2/8/2Q2K2

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qc7#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sh4
      • 2.Qf4#
    • 1...Se7
      • 2.Qf4#
    • 1...Sf8
      • 2.Qf4#
    • 1...Sgh8
      • 2.Qf4#
  • Tries
    • 1.Qb2+?
      • 1...Kf5
        • 2.Bc2#
      • 1...Kxd6!
    • 1.Qg5+?
      • 1...Kxd6
        • 2.Qd5#
      • 1...Sxg5!
    • 1.Qa1+?
      • 1...Kf5
        • 2.Bc2#
      • 1...Kxd6!
    • 1.Qc3+?
      • 1...Kf5
        • 2.Bc2#
      • 1...Kxd6
        • 2.Qc7#
      • 1...bxc3!
  • Keys
    • 1.Rf8!
      • 1...Kf5
        • 2.Qg5#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kf6
        • 2.Qg5#
      • 1...Sxf8
        • 2.Qf4#
      • 1...Sxd6
        • 2.Qb2#
        • 2.Qa1#
        • 2.Qc5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sh4
        • 2.Qf4#
      • 1...Se7
        • 2.Qf4#
      • 1...Sgh8
        • 2.Qf4#
      • 1...Sg5
        • 2.Qc5#
      • 1...Sh6
        • 2.Qc5#
      • 1...Sd8
        • 2.Qc5#
      • 1...Sfh8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XP(E)::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
    • S(c);N_GUARD::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::B(C)
      • Refutation
        • K(b);S_FLIGHT,XP(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XP(E)::QAR1(A)
      • Refutation
        • S(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::B(C)
      • Refutation
        • K(b);S_FLIGHT,XP(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::B(C)
        • K(b);OGATEB,S_FLIGHT,XP(E)::QAB1(A)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • R(G);
    • Vars
      • K(b);P-FLIGHT,P_SPINS(d)::QAR1(A)
      • K(b);OGATEB,S_FLIGHT,XP(E)::QAB1(A)
      • K(b);P_SPINS(d),S_FLIGHT::QAB1(A)
      • S(c);N_GUARD,XR(G)::QAB1(A)
      • S(c);N_GUARD::QAB1(A),XS(c)
      • S(c);N_GUARD::QAB1(A)
      • S(d);::QAR2(A)
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