MESON Chess Problem Database

Problem Display
PID: 225966 (6B1/5N2/Kp3b2/1Npr1p2/4kB2/4p2p/p7/rb3Q2 w - - 0 1)

Brown, David Leo

US Problem Bulletin, 1981

6B1/5N2/Kp3b2/1Npr1p2/4kB2/4p2p/p7/rb3Q2

#2

6 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc3#
    • 1...Re5
      • 2.Sfd6#
    • 1...Rd6
      • 2.Sfxd6#
    • 1...Bb2
      • 2.Sg5#
    • 1...Bc3
      • 2.Sg5#
    • 1...Bd4
      • 2.Sg5#
    • 1...Be5
      • 2.Sg5#
    • 1...Bg5
      • 2.Sxg5#
    • 1...Bg7
      • 2.Sg5#
    • 1...Bh8
      • 2.Sg5#
  • Tries
    • 1.Sbd6+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Rxd6!
  • Keys
    • 1.Be5!
      • threat
        • 2.Sc3#
      • 1...Rxe5
        • 2.Sfd6#
      • 1...Bxe5
        • 2.Sg5#
      • 1...Rd3
        • 2.Qh1#
      • 1...e2
        • 2.Qxe2#
      • 1...f4
        • 2.Bh7#
      • 1...Bd3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(h);SBLOCK,S_CUTB(k)::S(C)
    • R(h);N_GUARD::S(E)
    • R(h);N_GUARD::S(E),XR(h)
    • B(k);N_GUARD::S(E)
    • B(k);N_GUARD::S(E),XB(k)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR1(A)
      • Refutation
        • R(h);XS(C)
  • Actual
    • B(B);
    • Threat
      • S(C)
    • Vars
      • R(h);N_GUARD,SBLOCK,XB(B)::S(E)
      • B(k);N_GUARD,SBLOCK,XB(B)::S(E)
      • R(h);SBLOCK::QAB(A)
      • P(d);OGATEB::QAR2(A),XP(d)
      • P(i);OGATEB::B(F)
      • B(b);P_PINS(C),SBLOCK::QAR1(A)
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