MESON Chess Problem Database

Problem Display
PID: 187690 (8/8/3K1p2/2P2P2/3k2N1/1P4p1/3Pp1p1/bBB1Qnn1 w - - 0 1)

van Dijk, Johannes

De Schaakcourant, 1909

8/8/3K1p2/2P2P2/3k2N1/1P4p1/3Pp1p1/bBB1Qnn1

#2

9 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Bxb2#
    • 1...Bc3
      • 2.dxc3#
    • 1...Sxd2
      • 2.Qxd2#
    • 1...Sh2
      • 2.Qxg1#
    • 1...Se3
      • 2.dxe3#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sc6#
      • 1...Sxd2
        • 2.Qxd2#
      • 1...fxe5!
    • 1.Qf2+?
      • 1...Se3
        • 2.Qxe3#
        • 2.Qf4#
      • 1...gxf2!
    • 1.Qxg3?
      • threat
        • 2.Qf4#
        • 2.Qd3#
      • 1...Sxd2
        • 2.Qd3#
        • 2.Qe3#
      • 1...e1Q
        • 2.Qd3#
      • 1...e1S
        • 2.Qf4#
      • 1...e1R
        • 2.Qd3#
      • 1...Sf3
        • 2.Qf4#
      • 1...Se3
        • 2.Qf4#
        • 2.Qxe3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Sxg3!
    • 1.Qxe2?
      • threat
        • 2.Qd3#
        • 2.Qc4#
        • 2.Qe4#
      • 1...Sxd2
        • 2.Qd3#
        • 2.Qxd2#
        • 2.Qe3#
      • 1...Se3
        • 2.Qd3#
        • 2.Qxe3#
      • 1...Sxe2!
  • Keys
    • 1.Sh2!
      • 1...Sxd2
        • 2.Qxd2#
      • 1...Sxh2
        • 2.Qxg1#
      • 1...gxh2
        • 2.Qh4#
      • 1...Bb2
        • 2.Bxb2#
      • 1...Bc3
        • 2.dxc3#
      • 1...Se3
        • 2.dxe3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sh3
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::B(B),XB(a)
    • B(a);OGATE::P(D),XB(a)
    • S(b);OGATE,XP(D)::QAR2(C),XS(b)
    • S(b);OGATE::QAB(C),XS(c)
    • S(b);OGATE::P(D),XS(b)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • S(b);OGATE,XP(D)::QAR2(C),XS(b)
      • Refutation
        • P(h);XS(F)
    • Try
      • Q(C);CHECK
      • Refutation
        • P(f);XQ(C)
    • Try
      • Q(C);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAR1(C)
        • P(d);::QAR2(C)
        • S(c);::QAR2(C)
        • S(c);::QAR1(C)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);XP(d)
      • Threat
        • DUALS(3)
      • Refutation
        • S(c);XQ(C)
  • Actual
    • S(F);
    • Vars
      • S(b);OGATE,XP(D)::QAR2(C),XS(b)
      • S(b);OGATE,XS(F)::QAB(C),XS(c)
      • P(f);OGATE,XS(F)::QAR(C)
      • B(a);N_GUARD::B(B),XB(a)
      • B(a);OGATE::P(D),XB(a)
      • S(b);OGATE::P(D),XS(b)
      • S(c);N_GUARD::S(F),XS(c)
      • S(c);N_GUARD::S(F)
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