MESON Chess Problem Database

Problem Display
PID: 87747 (K7/5B2/p7/k1P5/1nQ5/3n4/4R3/8 w - - 0 1)

Rasmussen, Knud AK

American Chess Problemist, 1952

K7/5B2/p7/k1P5/1nQ5/3n4/4R3/8

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Ra2#
    • 1...Sa2
      • 2.Rxa2#
    • 1...Sd5
      • 2.Ra2#
    • 1...Sc6
      • 2.Ra2#
  • Keys
    • 1.Re4!
      • 1...Ka4
        • 2.Qxa6#
      • 1...Sxc5
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Se1
        • 2.Qxb4#
      • 1...Sb2
        • 2.Qxb4#
      • 1...Sf2
        • 2.Qxb4#
      • 1...Sf4
        • 2.Qxb4#
      • 1...Se5
        • 2.Qxb4#
      • 1...Sa2
        • 2.Qa4#
      • 1...Sc2
        • 2.Qa4#
      • 1...Sd5
        • 2.Qa4#
      • 1...Sc6
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINS(b)::R(A)
    • S(b);N_GUARD::R(A),XS(b)
    • S(b);N_GUARD::R(A)
  • Actual
    • R(A);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::QAR2(B),XP(d)
      • S(a);N_GUARD,XP(C)::QAB1(B),XS(b)
      • S(a);N_GUARD::QAB1(B),XS(b)
      • S(b);OGATE::QAR1(B)
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