MESON Chess Problem Database

Problem Display
PID: 78875 (8/3p4/3B4/7K/2pn2N1/3p1k1p/4R2P/1Q1B1b2 w - - 0 1)

Sammelius, Carel Johan Robert

2nd Comm., Schakend Nederland, 1978

8/3p4/3B4/7K/2pn2N1/3p1k1p/4R2P/1Q1B1b2

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Re3#
    • 1...Sc2
      • 2.Qb7#
    • 1...Sxe2
      • 2.Qb7#
    • 1...Sf5
      • 2.Qb7#
    • 1...Se6
      • 2.Qb7#
    • 1...d2
      • 2.Rf2#
      • 2.Qe4#
    • 1...c3
      • 2.Qxd3#
  • Tries
    • 1.Ba4?
      • threat
        • 2.Qxf1#
      • 1...Kxe2
        • 2.Qd1#
      • 1...Bxe2
        • 2.Qh1#
      • 1...Sxe2
        • 2.Qb7#
      • 1...Bg2
        • 2.Re3#
      • 1...dxe2!
  • Keys
    • 1.Bc2!
      • threat
        • 2.Qxf1#
      • 1...Kxe2
        • 2.Qd1#
      • 1...Bxe2
        • 2.Qh1#
      • 1...Sxe2
        • 2.Qb7#
      • 1...dxe2
        • 2.Be4#
      • 1...Bg2
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);SBLOCK::B(B)+R(C),DCHECK
    • S(f);N_GUARD::QAB(A)
    • S(f);N_GUARD,P_SPINS(f),XR(C)::QAB(A)
    • P(e);N_GUARD::QAR2(A),XP(b)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR2(A),XB(a)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(A)
        • B(a);OGATE,SBLOCK,XR(C)::QAB(A)
        • S(f);N_GUARD,SBLOCK,XR(C)::QAB(A)
        • B(a);SBLOCK::R1(C)
      • Refutation
        • P(b);XR(C)
  • Actual
    • B(B);
    • Threat
      • QAR2(A),XB(a)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(A)
      • B(a);OGATE,SBLOCK,XR(C)::QAB(A)
      • S(f);N_GUARD,SBLOCK,XR(C)::QAB(A)
      • P(b);OGATE,SBLOCK,XR(C)::B(B)
      • B(a);SBLOCK::R1(C)
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Developed and maintained by Brian Stephenson.
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