MESON Chess Problem Database

Problem Display
PID: 181888 (2b5/2b5/2Q2N1B/4pk1q/Kp4R1/1P4Pp/7P/8 w - - 0 1)

Daniel, Arthur William

San Francisco Chronicle, 1905

2b5/2b5/2Q2N1B/4pk1q/Kp4R1/1P4Pp/7P/8

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Rg5#
    • 1...Qe8
      • 2.Rg5#
    • 1...Qg5
      • 2.Rxg5#
    • 1...Be6
      • 2.Qf3#
  • Tries
    • 1.Sxh5?
      • threat
        • 2.Rg5#
        • 2.Qg6#
      • 1...Bd6
        • 2.Qxc8#
      • 1...e4
        • 2.Rg5#
        • 2.Qxe4#
      • 1...Bd8
        • 2.Qg6#
        • 2.Qxc8#
      • 1...Be6
        • 2.Rg5#
        • 2.Qf3#
        • 2.Qe4#
      • 1...Bd7
        • 2.Rg5#
        • 2.Qxd7#
      • 1...Kxg4!
    • 1.Qd7+?
      • 1...Kxf6
        • 2.Bg7#
      • 1...Bxd7+!
  • Keys
    • 1.Sg8!
      • 1...Kxg4
        • 2.Qe4#
      • 1...Qxg4
        • 2.Se7#
      • 1...Qxh6
        • 2.Sxh6#
      • 1...Bd6
        • 2.Qxc8#
      • 1...e4
        • 2.Qxe4#
      • 1...Qg6
        • 2.Qxg6#
      • 1...Qf7
        • 2.Rg5#
      • 1...Qe8
        • 2.Rg5#
      • 1...Qh4
        • 2.Qg6#
      • 1...Qg5
        • 2.Rxg5#
      • 1...Ba5
        • 2.Qxc8#
      • 1...Bb6
        • 2.Qxc8#
      • 1...Bb8
        • 2.Qxc8#
      • 1...Bd8
        • 2.Qxc8#
      • 1...Ba6
        • 2.Qd7#
      • 1...Be6
        • 2.Qf3#
        • 2.Qe4#
      • 1...Bb7
        • 2.Qd7#
      • 1...Bd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 1
  • Sets
    • Q(e);N_GUARD::R1(E)
    • Q(e);N_GUARD,P_PINQ(F)::R1(E)
    • Q(e);N_GUARD::R1(E),XQ(e)
    • B(g);SBLOCK::QAR2(F)
  • Tries
    • Try
      • S(G);XQ(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);OGATE::QAB(F),XB(g)
      • Refutation
        • K(d);S_FLIGHT,XR(E)
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT,XS(G)::B(H)
      • Refutation
        • B(g);CHECK,XQ(F)
  • Actual
    • S(G);
    • Vars
      • K(d);S_FLIGHT,XR(E)::QAR2(F)
      • Q(e);SBLOCK,XR(E)::S(G)
      • Q(e);XB(H)::S(G),XQ(e)
      • B(f);OGATE::QAB(F),XB(g)
      • P(c);::QAB1(F),XP(c)
      • Q(e);N_GUARD::QAB1(F),XQ(e)
      • Q(e);N_GUARD::R1(E)
      • Q(e);N_GUARD,P_PINQ(F)::R1(E)
      • Q(e);N_GUARD::QAB1(F)
      • Q(e);N_GUARD::R1(E),XQ(e)
      • B(g);N_GUARD::QAB(F)
      • B(g);N_GUARD,P_PINQ(F)::QAB(F),XB(g)
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