MESON Chess Problem Database

Problem Display
PID: 24931 (n1R5/2b3n1/6B1/1p2Nq2/rp5K/8/1PkN3R/1bB2Q2 w - - 0 1)

Visserman, Eeltje

Gelderland-Overijssel, 1945

n1R5/2b3n1/6B1/1p2Nq2/rp5K/8/1PkN3R/1bB2Q2

#2

9 + 9

274 diagrammes 1974

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Bxd3#
    • 1...Qe4+
      • 2.Bxe4#
    • 1...Sh5
      • 2.Bxf5#
    • 1...Se6
      • 2.Bxf5#
    • 1...Se8
      • 2.Bxf5#
    • 1...b3+
      • 2.Sdc4#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Se3#
      • 1...Qe4
        • 2.Bxe4#
      • 1...b3
        • 2.Sf3#
      • 1...Ra3!
    • 1.Rh1?
      • threat
        • 2.Qd1#
      • 1...Qe4+
        • 2.Bxe4#
      • 1...b3+!
    • 1.Qxf5+?
      • 1...Kxc1
        • 2.Qxb1#
      • 1...Kd1
        • 2.Qf1#
      • 1...Sxf5+!
  • Keys
    • 1.Sef3!
      • threat
        • 2.Sd4#
      • 1...Qe4+
        • 2.Bxe4#
      • 1...b3+
        • 2.Se4#
      • 1...Se6
        • 2.Bxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • Q(f);OGATE::B(H),XQ(f)
    • Q(f);CHECK,OGATE::B(H),XQ(f)
    • S(h);N_GUARD::B(H),XQ(f)
    • P(d);CHECK,SBLOCK::R(E)+S(D)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • Q(f);OGATE,P_PINS(G)::B(H),XQ(f)
        • P(d);P_PINS(G),SBLOCK::R(E)+S(D)
      • Refutation
        • R(c);
    • Try
      • R(E);
      • Threat
        • QAB1(B)
      • Vars
        • Q(f);CHECK,OGATE::B(H),XQ(f)
      • Refutation
        • P(d);CHECK
    • Try
      • Q(B);CHECK,XQ(f)
      • Vars
        • K(b);OGATE,P-FLIGHT,XB(A)::QAR1(B),XB(a)
        • K(b);N_SPINB(g),S_FLIGHT::QAR2(B)
      • Refutation
        • S(h);CHECK,P_SPINS(h),XQ(B)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(f);CHECK,OGATE::B(H),XQ(f)
      • P(d);CHECK,SBLOCK::R(E)+S(D)
      • S(h);N_GUARD::B(H),XQ(f)
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