MESON Chess Problem Database

Problem Display
PID: 175224 (k7/1rB5/1P2n3/3R4/2n5/8/5K2/2Q5 w - - 0 1)

Ferber, Eugene

The Times, 1902

k7/1rB5/1P2n3/3R4/2n5/8/5K2/2Q5

#2

5 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Ra5+?
      • 1...Ra7
        • 2.Rxa7#
        • 2.Qh1#
      • 1...Sxa5!
    • 1.Rd8+?
      • 1...Rb8
        • 2.Rxb8#
        • 2.Qh1#
      • 1...Sxd8!
  • Keys
    • 1.Qh1!
      • 1...Rxb6
        • 2.Ra5#
      • 1...Rxc7
        • 2.Rd8#
      • 1...Sxb6
        • 2.Ra5#
      • 1...Sxc7
        • 2.Rd8#
      • 1...Ra7
        • 2.Ra5#
        • 2.Rd8#
      • 1...Rb8
        • 2.Ra5#
        • 2.Rd8#
      • 1...Sa5
        • 2.Rxa5#
      • 1...Sb2
        • 2.Ra5#
      • 1...Sd2
        • 2.Ra5#
      • 1...Sa3
        • 2.Ra5#
      • 1...Se3
        • 2.Ra5#
      • 1...Se5
        • 2.Ra5#
      • 1...Sd6
        • 2.Ra5#
      • 1...Sd4
        • 2.Rd8#
      • 1...Sf4
        • 2.Rd8#
      • 1...Sc5
        • 2.Rd8#
      • 1...Sg5
        • 2.Rd8#
      • 1...Sg7
        • 2.Rd8#
      • 1...Sd8
        • 2.Rxd8#
      • 1...Sf8
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 18
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • S(a);XR(C)
    • Try
      • R(C);CHECK
      • Refutation
        • S(b);XR(C)
  • Actual
    • Q(A);
    • Vars
      • R(c);XP(D)::QAB(A)+R(C),DCHECK
      • R(c);XB(E)::QAB(A)+R(C),DCHECK
      • S(a);N_GUARD,XP(D)::R(C)
      • S(b);N_GUARD,XB(E)::R(C)
      • S(a);N_GUARD::R(C),XS(a)
      • S(a);N_GUARD::R(C)
      • S(b);N_GUARD::R(C)
      • S(b);N_GUARD::R(C),XS(b)
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