MESON Chess Problem Database

Problem Display
PID: 230210 (5B2/1N6/8/1P6/k7/1rbQ4/1pK5/1N6 w - - 0 1)

Becker, Christopher Bennett

US Problem Bulletin, 1988

5B2/1N6/8/1P6/k7/1rbQ4/1pK5/1N6

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5
      • 2.Sxc3#
    • 1...Be1
      • 2.Qxb3#
    • 1...Bd2
      • 2.Qxb3#
    • 1...Bd4
      • 2.Qxb3#
    • 1...Ba5
      • 2.Qxb3#
    • 1...Be5
      • 2.Qxb3#
    • 1...Bf6
      • 2.Qxb3#
    • 1...Bg7
      • 2.Qxb3#
    • 1...Bh8
      • 2.Qxb3#
  • Tries
    • 1.Qxc3?
      • threat
        • 2.Qa5#
        • 2.Qxb3#
      • 1...Rxc3+
        • 2.Sxc3#
      • 1...Rxb5
        • 2.Qa3#
      • 1...Rb4
        • 2.Qxb4#
      • 1...Ra3
        • 2.Qb4#
        • 2.Qa5#
        • 2.Qc4#
      • 1...Kxb5!
  • Keys
    • 1.b6!
      • 1...Rxb6
        • 2.Sxc3#
      • 1...Rb4
        • 2.Qa6#
      • 1...Ra3
        • 2.Qd7#
      • 1...Rb5
        • 2.Sxc3#
      • 1...Be1
        • 2.Qxb3#
      • 1...Bd2
        • 2.Qxb3#
      • 1...Bb4
        • 2.Qd7#
      • 1...Bd4
        • 2.Qa6#
        • 2.Qxb3#
      • 1...Ba5
        • 2.Qxb3#
      • 1...Be5
        • 2.Qa6#
        • 2.Qxb3#
      • 1...Bf6
        • 2.Qa6#
        • 2.Qxb3#
      • 1...Bg7
        • 2.Qa6#
        • 2.Qxb3#
      • 1...Bh8
        • 2.Qa6#
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD,XP(D)::S(A),XB(c)
    • B(c);OGATE::QAB1(C),XR(b)
  • Tries
    • Try
      • Q(C);XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,XQ(C)::S(A),XR(b)
        • R(b);OGATE,SBLOCK,XP(D)::QAR1(C)
        • R(b);N_GUARD::QAR1(C),XR(b)
      • Refutation
        • K(d);S_FLIGHT,XP(D)
  • Actual
    • P(D);
    • Vars
      • R(b);N_GUARD,XP(D)::S(A),XB(c)
      • R(b);S_CUTB(c)::QAR2(C)
      • R(b);N_GUARD::QAB(C)
      • R(b);N_GUARD::S(A),XB(c)
      • B(c);OGATE::QAB1(C),XR(b)
      • B(c);S_CUTR(b)::QAB(C)
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