MESON Chess Problem Database

Problem Display
PID: 222658 (2R5/1Q6/R1q5/3kN1KN/Pn6/2p1P3/2P3P1/8 w - - 0 1)

Studd, Alnod Ernest

English Mechanic and World of Science, 1884

(First published on Fri Aug 1 1884)

2R5/1Q6/R1q5/3kN1KN/Pn6/2p1P3/2P3P1/8

#2

10 + 4

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sf7?
      • 1...Kc4
        • 2.Qb5#
      • 1...Kc5
        • 2.Qb5#
      • 1...Ke6
        • 2.Sf4#
      • 1...Qxb7
        • 2.Sf6#
      • 1...Sxc2
        • 2.Qxc6#
      • 1...Sxa6
        • 2.Qxc6#
      • 1...Sa2
        • 2.Qxc6#
      • 1...Sd3
        • 2.Qxc6#
      • 1...Ke4!
    • 1.Qxc6+?
      • 1...Kxe5
        • 2.Re8#
        • 2.Qe6#
      • 1...Sxc6!
  • Keys
    • 1.Sc4!
      • 1...Kxc4
        • 2.Qb5#
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc5
        • 2.Qb5#
      • 1...Ke6
        • 2.Sf4#
      • 1...Qxb7
        • 2.Sf6#
      • 1...Sxc2
        • 2.Qxc6#
      • 1...Sxa6
        • 2.Qxc6#
      • 1...Sa2
        • 2.Qxc6#
      • 1...Sd3
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • K(c);S_FLIGHT::QAB1(I)
        • K(c);P-FLIGHT::QAR1(I)
        • K(c);S_FLIGHT::S(G)
        • Q(d);N_SPINQ(d),XQ(I)::S(G)
        • S(b);N_GUARD,XP(A)::QAB1(I),XQ(d)
        • S(b);N_GUARD,XR(H)::QAB1(I),XQ(d)
        • S(b);N_GUARD::QAB1(I),XQ(d)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(I);CHECK,XQ(d)
      • Refutation
        • S(b);XQ(I)
  • Actual
    • S(E);
    • Vars
      • K(c);S_FLIGHT,XS(E)::QAB1(I)
      • K(c);S_FLIGHT::S(G)
      • K(c);P-FLIGHT::QAR1(I)
      • Q(d);N_SPINQ(d),XQ(I)::S(G)
      • S(b);N_GUARD,XP(A)::QAB1(I),XQ(d)
      • S(b);N_GUARD,XR(H)::QAB1(I),XQ(d)
      • S(b);N_GUARD::QAB1(I),XQ(d)
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