MESON Chess Problem Database

Problem Display
PID: 95557 (8/B1K5/Q7/3PN3/4k1Pp/r4p1P/b3N3/5B2 w - - 0 1)

Grede, K

Libauer Zeitung, 1900

8/B1K5/Q7/3PN3/4k1Pp/r4p1P/b3N3/5B2

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qe6#
  • Tries
    • 1.Qd3+?
      • 1...Kxe5
        • 2.Qf5#
        • 2.Qd4#
      • 1...Rxd3!
    • 1.Qc4+?
      • 1...Kxe5
        • 2.Qd4#
      • 1...Bxc4!
    • 1.Qg6+?
      • 1...Kxe5
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kxd5!
  • Keys
    • 1.Sd3!
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Rxd3
        • 2.Qe6#
      • 1...Rxa6
        • 2.Sc3#
      • 1...Bxd5
        • 2.Qg6#
      • 1...fxe2
        • 2.Bg2#
      • 1...Bc4
        • 2.Qxc4#
      • 1...f2
        • 2.Bg2#
      • 1...Rb3
        • 2.Qc4#
      • 1...Ra4
        • 2.Sc3#
      • 1...Ra5
        • 2.Sc3#
      • 1...Bb1
        • 2.Qc4#
      • 1...Bb3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 1
  • Sets
    • K(d);OGATEB,P-FLIGHT,XS(F)::QAR1(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • R(b);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);P-FLIGHT,XS(F)::QAB1(G)
      • Refutation
        • B(a);XQ(G)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(d);S_FLIGHT,XP(E)
  • Actual
    • S(F);
    • Vars
      • R(b);CHECK,N_GUARD::S(B),XR(b)
      • K(d);OGATEB,S_FLIGHT,XP(E)::QAB1(G)
      • R(b);SBLOCK,XS(F)::QAR2(G)
      • R(b);N_GUARD,XQ(G)::S(B)
      • B(a);SBLOCK,XP(E)::QAB(G)
      • P(c);OGATEB,XS(B)::B(A)
      • B(a);N_GUARD::QAR2(G),XB(a)
      • P(c);OGATEB::B(A)
      • R(b);S_CUTB(a)::QAR2(G)
      • R(b);N_GUARD::S(B)
      • B(a);N_GUARD::QAR2(G)
      • B(a);S_CUTR(b)::S(B)
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