MESON Chess Problem Database

Problem Display
PID: 208169 (8/3Bp3/3p4/2pk1N2/p3r3/P1QNP1P1/6K1/8 w - - 0 1)

Babson, Joseph Ney

Dubuque Chess Journal, 1875

8/3Bp3/3p4/2pk1N2/p3r3/P1QNP1P1/6K1/8

#2

8 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qa5#
    • 1...e5
      • 2.Se7#
    • 1...e6
      • 2.Se7#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Bc6#
      • 1...cxd4
        • 2.Qc6#
      • 1...Rxd4!
    • 1.Qb3+?
      • 1...Rc4
        • 2.Qb7#
      • 1...c4
        • 2.Qb5#
        • 2.Qb7#
      • 1...axb3!
  • Keys
    • 1.Kf3!
      • 1...Rxe3+
        • 2.Sxe3#
      • 1...Rf4+
        • 2.Sxf4#
      • 1...Rb4
        • 2.Sxe7#
      • 1...Rc4
        • 2.Sxe7#
      • 1...Rd4
        • 2.Sxe7#
      • 1...Rg4
        • 2.Sxe7#
      • 1...Rh4
        • 2.Sxe7#
      • 1...Re5
        • 2.Sf4#
      • 1...Re6
        • 2.Sf4#
      • 1...c4
        • 2.Qa5#
      • 1...e5
        • 2.Se7#
      • 1...e6
        • 2.Se7#

This is a version of 164301

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAR(C)
    • P(f);S_CUTR(b)::S(G)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(H)
      • Vars
        • P(c);OGATE,XS(G)::QAB1(C)
      • Refutation
        • R(b);XS(G)
    • Try
      • Q(C);CHECK
      • Vars
        • R(b);P_SPINR(b),SBLOCK::QAB(C)
      • Refutation
        • P(a);XQ(C)
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • R(b);CHECK,XP(E)::S(G),XR(b)
      • R(b);CHECK,N_GUARD::S(D),XR(b)
      • R(b);N_GUARD::S(G),XP(f)
      • R(b);N_GUARD::S(D)
      • P(c);OGATEB,SBLOCK::QAR(C)
      • P(f);S_CUTR(b)::S(G)
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