MESON Chess Problem Database

Problem Display
PID: 173127 (r7/1Q6/2p5/k2b4/8/K7/2N5/8 w - - 0 1)

McDowell, Michael

Problem Observer, 1984

r7/1Q6/2p5/k2b4/8/K7/2N5/8

#2

3 + 4

3713 Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qb4#
  • Keys
    • 1.Sd4!
      • 1...Ra7
        • 2.Qxa7#
      • 1...Ra6
        • 2.Qb4#
      • 1...Rb8
        • 2.Qa7#
      • 1...Rc8
        • 2.Qa7#
      • 1...Rd8
        • 2.Qa7#
      • 1...Re8
        • 2.Qa7#
      • 1...Rf8
        • 2.Qa7#
      • 1...Rg8
        • 2.Qa7#
      • 1...Rh8
        • 2.Qa7#
      • 1...Bh1
        • 2.Sb3#
      • 1...Ba2
        • 2.Sxc6#
      • 1...Bg2
        • 2.Sb3#
      • 1...Bb3
        • 2.Sxb3#
        • 2.Sxc6#
      • 1...Bf3
        • 2.Sb3#
      • 1...Bc4
        • 2.Sxc6#
      • 1...Be4
        • 2.Sb3#
      • 1...Be6
        • 2.Sxc6#
      • 1...Bf7
        • 2.Sxc6#
      • 1...Bg8
        • 2.Sxc6#
      • 1...c5
        • 2.Qb5#

This anticipates 7378(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 18
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::QAB1(C)
  • Actual
    • S(A);
    • Vars
      • R(d);N_GUARD::QAR2(C),XR(d)
      • R(d);SBLOCK::QAB1(C)
      • R(d);N_GUARD::QAR2(C)
      • B(b);N_GUARD::S(A)
      • B(b);N_GUARD::S(A),XP(c)
      • P(c);N_GUARD::QAR1(C)
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