MESON Chess Problem Database

Problem Display
PID: 103950 (2b5/R4K2/8/2N2k2/7Q/8/2p5/2r5 w - - 0 1)

Janet, Frank

St. Louis Globe Democrat, 1915

(First published on Thu Dec 16 1915)

2b5/R4K2/8/2N2k2/7Q/8/2p5/2r5

#2

4 + 4

2642 Good Companions (February) 1917
6490 yacpdb 2009
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Sd3?
      • threat
        • 2.Ra5#
        • 2.Qf4#
      • 1...Ra1
        • 2.Qf4#
      • 1...Rb1
        • 2.Qf4#
      • 1...Re1
        • 2.Qf4#
      • 1...Rf1
        • 2.Ra5#
      • 1...Ba6
        • 2.Qf4#
      • 1...Bb7
        • 2.Qf4#
      • 1...Bd7
        • 2.Qf4#
      • 1...Be6+!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Se4#
        • 2.Sa6#
        • 2.Se6#
        • 2.Sb7#
        • 2.Sd7#
      • 1...Be6+
        • 2.Sxe6#
      • 1...Ke5
        • 2.Sb7#
      • 1...Ra1
        • 2.Sa4#
      • 1...Rb1
        • 2.Sb3#
      • 1...Rd1
        • 2.Sd3#
      • 1...Re1
        • 2.Se4#
      • 1...Ba6
        • 2.Sxa6#
      • 1...Bb7
        • 2.Sxb7#
      • 1...Bd7
        • 2.Sxd7#

This anticipates 77968(1925), 54281(1950)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAR1(A)
        • R(a);::R(C)
        • B(d);::QAR1(A)
      • Refutation
        • B(d);CHECK
  • Actual
    • R(C);
    • Threat
      • DUALS(8)
    • Vars
      • B(d);CHECK::R(C)+S(B),XB(d)
      • K(c);P-FLIGHT::R(C)+S(B)
      • R(a);::R(C)+S(B)
      • B(d);::R(C)+S(B),XB(d)
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