MESON Chess Problem Database

Problem Display
PID: 115726 (3n4/8/5K2/N1pp1P2/2pkB1p1/3P2P1/3Qp1P1/4B1b1 w - - 0 1)

Eriksson, Finn Olof

Vart Hem, 1937

3n4/8/5K2/N1pp1P2/2pkB1p1/3P2P1/3Qp1P1/4B1b1

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Bxf2#
    • 1...Bh2
      • 2.Bf2#
    • 1...Be3
      • 2.Qc3#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Se6
      • 2.Sc6#
    • 1...Sb7
      • 2.Sc6#
    • 1...Sf7
      • 2.Sc6#
    • 1...cxd3
      • 2.Qxd3#
    • 1...c3
      • 2.Sb3#
    • 1...dxe4
      • 2.dxc4#
  • Tries
    • 1.Bf3?
      • threat
        • 2.dxc4#
      • 1...cxd3
        • 2.Qf4#
      • 1...Be3
        • 2.Qc3#
      • 1...c3
        • 2.Sb3#
      • 1...gxf3!
    • 1.Qxe2?
      • 1...cxd3
        • 2.Qxd3#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Bh2
        • 2.Qf2#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Se6
        • 2.Sc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...Sf7
        • 2.Sc6#
      • 1...c3
        • 2.Sb3#
      • 1...Be3!
  • Keys
    • 1.Qf4!
      • 1...cxd3
        • 2.Bf3#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Bh2
        • 2.Qf2#
      • 1...Be3
        • 2.Qe5#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Se6
        • 2.Sc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...Sf7
        • 2.Sc6#
      • 1...c3
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::B(A),XB(a)
    • B(a);N_GUARD::B(A)
    • B(a);SBLOCK::QAB1(B)
    • S(h);N_GUARD::S(G),XS(h)
    • S(h);N_GUARD::S(G)
    • P(c);OGATE,P_SPINP(c),XP(D)::QAR1(B),XP(c)
    • P(c);N_GUARD::S(G)
    • P(g);SBLOCK,XB(F)::QAR(B)+P(D),XP(c)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAR(B)+P(D),XP(c)
      • Vars
        • P(c);P_SPINP(c),SBLOCK,XP(D)::QAR2(B)
        • B(a);SBLOCK::QAB1(B)
        • P(c);N_GUARD::S(G)
      • Refutation
        • P(e);XB(F)
    • Try
      • Q(B);XP(b)
      • Vars
        • P(c);OGATE,XP(D)::QAR1(B),XP(c)
        • P(g);OGATE,XB(F)::QAR1(B),XP(g)
        • B(a);N_GUARD::QAB(B),XB(a)
        • B(a);N_GUARD::QAB(B)
        • S(h);N_GUARD::S(G),XS(h)
        • S(h);N_GUARD::S(G)
        • P(c);N_GUARD::S(G)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Vars
      • P(c);SBLOCK,XP(D)::QAR(B)+B(F)
      • P(g);OGATE,P_SPINP(g),XB(F)::QAR1(B),XP(g)
      • B(a);N_GUARD::QAB(B),XB(a)
      • B(a);N_GUARD::QAB(B)
      • B(a);SBLOCK::QAB1(B)
      • S(h);N_GUARD::S(G),XS(h)
      • S(h);N_GUARD::S(G)
      • P(c);N_GUARD::S(G)
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Developed and maintained by Brian Stephenson.
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