MESON Chess Problem Database

Problem Display
PID: 90281 (8/6p1/6Kp/1p5Q/1P1pN3/1B1Nk3/8/8 w - - 0 1)

Nebendorf, Ernst

Die Schwalbe, 1940

8/6p1/6Kp/1p5Q/1P1pN3/1B1Nk3/8/8

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Qf3#
    • 1...Kxe4
      • 2.Qe2#
  • Tries
    • 1.Kxg7?
      • 1...Kxd3
        • 2.Qf3#
      • 1...Kxe4!
    • 1.Ba2?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kxd3!
    • 1.Bc4?
      • 1...Kxe4
        • 2.Qe2#
      • 1...bxc4!
    • 1.Be6?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kxd3!
    • 1.Bf7?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kxd3!
    • 1.Bg8?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kxd3!
    • 1.Qd1?
      • 1...Kxe4
        • 2.Qe2#
      • 1...h5!
    • 1.Qg4?
      • 1...Kxd3
        • 2.Qf3#
      • 1...h5!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Qe2#
        • 2.Qf3#
      • 1...Kxd3
        • 2.Qe2#
      • 1...Kxe4
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XS(B)::QAR2(E)
    • K(a);P-FLIGHT,XS(D)::QAR2(E)
  • Tries
    • Try
      • K(F);P-FLIGHT,XP(e)
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR2(E)
      • Refutation
        • P(c);XB(A)
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR2(E)
      • Refutation
        • P(d);
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR2(E)
      • Refutation
        • P(d);
  • Actual
    • B(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT,XS(B)::QAB1(E)
      • K(a);P-FLIGHT,XS(D)::QAB1(E)
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