MESON Chess Problem Database

Problem Display
PID: 90844 (8/8/8/8/3p1p2/4k3/1K1NpN1B/4Q3 w - - 0 1)

Jonsson, Gustav

Die Schwalbe, 1960

8/8/8/8/3p1p2/4k3/1K1NpN1B/4Q3

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Sf1#
      • 2.Sc4#
  • Tries
    • 1.Ka1?
      • 1...f3
        • 2.Sf1#
        • 2.Sc4#
      • 1...d3!
    • 1.Kb1?
      • 1...f3
        • 2.Sf1#
        • 2.Sc4#
      • 1...d3!
    • 1.Kc1?
      • 1...f3
        • 2.Sf1#
        • 2.Sc4#
      • 1...d3!
    • 1.Ka2?
      • 1...f3
        • 2.Sf1#
        • 2.Sc4#
      • 1...d3!
    • 1.Ka3?
      • 1...f3
        • 2.Sf1#
        • 2.Sc4#
      • 1...d3!
    • 1.Kb3?
      • 1...f3
        • 2.Sf1#
        • 2.Sc4#
      • 1...d3!
    • 1.Bg1?
      • 1...d3
        • 2.Sd1#
        • 2.Sh1#
        • 2.Sh3#
        • 2.Sfe4#
        • 2.Sg4#
      • 1...f3!
    • 1.Qc1?
      • 1...Kxf2
        • 2.Qg1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...f3
        • 2.Sde4#
      • 1...d3!
  • Keys
    • 1.Qg1!
      • 1...Kxd2
        • 2.Bxf4#
        • 2.Qc1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...d3
        • 2.Sfe4#
      • 1...f3
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Refutation
        • P(c);
    • Try
      • K(B);S_FLIGHT
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Refutation
        • P(c);
    • Try
      • K(B);S_FLIGHT
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Refutation
        • P(c);
    • Try
      • B(E);
      • Refutation
        • P(d);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(D)::QAB1(A)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
        • P(d);SBLOCK::QAB(A)+S(C)
      • Refutation
        • P(c);
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • P(a);OGATEB::QAR2(A),XQ(a)
      • P(a);OGATEB::QAR2(A),XS(a)
      • P(a);OGATEB::QAR2(A),XB(a)
      • P(a);OGATEB::QAR2(A),XR(a)
      • P(c);SBLOCK::QAB(A)+S(D)
      • P(d);SBLOCK::S(C)
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