MESON Chess Problem Database

Problem Display
PID: 250968 (8/2N1Kb2/5p2/4p1r1/pPpk2r1/8/3P3n/NB3Qb1 w - - 0 1)

van der Scheur, D

Probleemblad, 1981

8/2N1Kb2/5p2/4p1r1/pPpk2r1/8/3P3n/NB3Qb1

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Sc2#
    • 1...Bf2
      • 2.Qxf2#
    • 1...Bd5
      • 2.Sb5#
    • 1...c3
      • 2.Qd3#
  • Tries
    • 1.Sb3+?
      • 1...cxb3
        • 2.Qd3#
      • 1...axb3!
    • 1.Qc1?
      • threat
        • 2.Qc3#
      • 1...c3
        • 2.Qxc3#
      • 1...Rg3!
    • 1.Qf3?
      • threat
        • 2.Sc2#
        • 2.Sb5#
        • 2.Qc3#
      • 1...c3
        • 2.Qxc3#
        • 2.Qd3#
      • 1...e4
        • 2.Qc3#
      • 1...Rg3
        • 2.Sc2#
        • 2.Sb5#
        • 2.Qe4#
      • 1...Re4
        • 2.Sc2#
        • 2.Qxe4#
        • 2.Qc3#
      • 1...Be3
        • 2.Sb5#
        • 2.Qxe3#
      • 1...Bg6
        • 2.Sb5#
        • 2.Se6#
        • 2.Qd5#
        • 2.Qc3#
      • 1...Be8
        • 2.Sc2#
        • 2.Se6#
        • 2.Qd5#
        • 2.Qc3#
      • 1...Sxf3!
    • 1.Qf5?
      • threat
        • 2.Sc2#
      • 1...c3
        • 2.Qd3#
      • 1...Re4
        • 2.Qxe4#
      • 1...e4
        • 2.Sb5#
      • 1...Rxf5!
  • Keys
    • 1.Kd6!
      • threat
        • 2.Sb5#
      • 1...Be8
        • 2.Se6#
      • 1...e4
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(f);SBLOCK::S(A)
    • B(a);N_GUARD::QAB(C),XB(a)
    • B(j);SBLOCK::S(F)
    • P(d);N_GUARD::QAR1(C)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • P(d);XS(A)::QAR1(C)
      • Refutation
        • P(c);XS(A)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(d);::QAB1(C),XP(d)
      • Refutation
        • R(f);
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(g);::QAB1(C)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);
      • Threat
        • S(A)
      • Vars
        • P(d);N_GUARD::QAR1(C)
        • R(f);N_GUARD::QAR1(C),XR(f)
        • P(g);::S(F)
      • Refutation
        • R(h);XQ(C)
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • S(F)
    • Vars
      • B(j);N_GUARD::S(F)
      • P(g);SBLOCK::S(A)
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