MESON Chess Problem Database

Problem Display
PID: 77640 (4B3/8/8/5N2/8/3r2p1/4k1K1/2Q5 w - - 0 1)

Lewis, Robert Tony

The Problemist, 1978

4B3/8/8/5N2/8/3r2p1/4k1K1/2Q5

#2

4 + 3

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qe3#
    • 1...Rd2
      • 2.Qf1#
  • Tries
    • 1.Ba4?
      • 1...Rd1
        • 2.Qe3#
        • 2.Qxd1#
      • 1...Rd2
        • 2.Qf1#
      • 1...Ra3
        • 2.Qd1#
      • 1...Rc3
        • 2.Qd1#
      • 1...Re3
        • 2.Qxe3#
        • 2.Qd1#
      • 1...Rf3
        • 2.Qd1#
      • 1...Rd4
        • 2.Qe3#
      • 1...Rd5
        • 2.Qe3#
      • 1...Rd6
        • 2.Qe3#
      • 1...Rd7
        • 2.Qe3#
      • 1...Rd8
        • 2.Qe3#
      • 1...Rb3!
  • Keys
    • 1.Bg6!
      • 1...Rd1
        • 2.Qe3#
      • 1...Rd2
        • 2.Qf1#
      • 1...Ra3
        • 2.Sd4#
      • 1...Rb3
        • 2.Sd4#
      • 1...Rc3
        • 2.Sd4#
      • 1...Re3
        • 2.Sd4#
      • 1...Rf3
        • 2.Sd4#
      • 1...Rd4
        • 2.Sxg3#
        • 2.Sxd4#
      • 1...Rd5
        • 2.Sxg3#
      • 1...Rd6
        • 2.Sxg3#
      • 1...Rd7
        • 2.Sxg3#
      • 1...Rd8
        • 2.Sxg3#

This anticipates 75072(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,SBLOCK::QAR1(A)
    • R(b);SBLOCK::QAB1(A)
  • Tries
    • Try
      • B(D);
      • Vars
        • R(b);SBLOCK::QAB1(A)
        • R(b);N_GUARD::QAB1(A)
        • R(b);N_GUARD::QAR1(A)
      • Refutation
        • R(b);
  • Actual
    • B(D);
    • Vars
      • R(b);N_GUARD,SBLOCK::QAR1(A)
      • R(b);SBLOCK::QAB1(A)
      • R(b);N_GUARD::S(C)
      • R(b);N_GUARD::S(C),XP(c)
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