MESON Chess Problem Database

Problem Display
PID: 48660 (8/3N4/r2pp3/3k4/2R4N/p5Q1/Kn4n1/7b w - - 0 1)

Studd, Alnod Ernest

Source?, 0000

8/3N4/r2pp3/3k4/2R4N/p5Q1/Kn4n1/7b

#2

5 + 8

508 Chess Chips 1878
15 British Chess Magazine 1890

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sb6#
    • 1...Ra5
      • 2.Sb6#
    • 1...Rb6
      • 2.Sxb6#
    • 1...Ra7
      • 2.Sb6#
    • 1...Ra8
      • 2.Sb6#
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...e5
      • 2.Qg8#
  • Tries
    • 1.Qg5+?
      • 1...e5
        • 2.Qg8#
      • 1...Kxc4!
  • Keys
    • 1.Sf5!
      • 1...Kxc4
        • 2.Qb3#
      • 1...Sxc4
        • 2.Qf3#
      • 1...exf5
        • 2.Qg8#
      • 1...e5
        • 2.Qg8#
      • 1...Ra4
        • 2.Sb6#
      • 1...Ra5
        • 2.Sb6#
      • 1...Rb6
        • 2.Sxb6#
      • 1...Rc6
        • 2.Rd4#
      • 1...Ra7
        • 2.Sb6#
      • 1...Ra8
        • 2.Sb6#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Se1
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sf4
        • 2.Se3#
      • 1...Sh4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD::S(E)
    • R(f);N_GUARD::S(E),XR(f)
    • S(b);N_GUARD::QAR2(B)
    • S(b);N_GUARD::QAR2(B),XS(b)
    • P(h);OGATEB::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(h);OGATEB,P_SPINP(h)::QAB(B)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
  • Actual
    • S(D);
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • S(b);SBLOCK,XR(C)::QAB(B)
      • P(h);OGATEB,XS(D)::QAB(B)
      • P(h);OGATEB::QAB(B)
      • R(f);N_GUARD::S(E)
      • R(f);N_GUARD::S(E),XR(f)
      • R(f);SBLOCK::R1(C)
      • S(b);N_GUARD::QAR2(B)
      • S(b);N_GUARD::QAR2(B),XS(b)
      • S(c);N_GUARD::S(D)
      • S(c);N_GUARD::S(D),XS(c)
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