MESON Chess Problem Database

Problem Display
PID: 138941 (4q2r/p2b1BQ1/5p2/1p2P3/pP1kPB1p/K6p/2RN2p1/2N5 w - - 0 1)

Beck, Friedrich

Die Schwalbe, 1965

4q2r/p2b1BQ1/5p2/1p2P3/pP1kPB1p/K6p/2RN2p1/2N5

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...g1Q
      • 2.Qxg1#
    • 1...g1S
      • 2.Qxg1#
    • 1...g1B
      • 2.Qxg1#
    • 1...g1R
      • 2.Qxg1#
    • 1...f5
      • 2.e6#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Sf3#
      • 1...g1S
        • 2.Qxg1#
      • 1...Bg4
        • 2.Qxa7#
      • 1...Qh5!
    • 1.Bg6?
      • threat
        • 2.Sf3#
      • 1...Qxg6
        • 2.Qxd7#
      • 1...Bg4
        • 2.Qxa7#
      • 1...Bf5
        • 2.Qxa7#
      • 1...f5
        • 2.e6#
      • 1...g1S!
    • 1.Bxe8?
      • threat
        • 2.Qxd7#
      • 1...Bxe8
        • 2.Qxa7#
      • 1...Bg4
        • 2.Qxa7#
      • 1...Bf5
        • 2.Qxa7#
      • 1...Bc6
        • 2.Qxa7#
      • 1...Be6
        • 2.Qxa7#
      • 1...Bc8
        • 2.Qxa7#
      • 1...Rh7!
    • 1.Rc3?
      • threat
        • 2.Se2#
        • 2.Rd3#
      • 1...g1S
        • 2.Rd3#
      • 1...Bg4
        • 2.Rd3#
      • 1...Kxc3!
    • 1.Qxg2?
      • threat
        • 2.Qg1#
        • 2.Qf2#
      • 1...Qg8
        • 2.Qf2#
      • 1...Rg8
        • 2.Qf2#
      • 1...h2
        • 2.Qf2#
      • 1...hxg2!
    • 1.Qg3?
      • threat
        • 2.Se2#
        • 2.Be3#
        • 2.Qf2#
        • 2.Qc3#
        • 2.Qd3#
        • 2.Qe3#
      • 1...g1Q
        • 2.Se2#
        • 2.Qxg1#
        • 2.Qc3#
        • 2.Qd3#
      • 1...g1S
        • 2.Be3#
        • 2.Qf2#
        • 2.Qxg1#
        • 2.Qc3#
        • 2.Qd3#
        • 2.Qe3#
      • 1...g1B
        • 2.Se2#
        • 2.Qxg1#
        • 2.Qc3#
        • 2.Qd3#
      • 1...Qc8
        • 2.Se2#
        • 2.Be3#
        • 2.Qf2#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Bg4
        • 2.Be3#
        • 2.Qf2#
        • 2.Qc3#
        • 2.Qd3#
        • 2.Qe3#
      • 1...hxg3!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Se2#
      • 1...bxc4
        • 2.Rxc4#
      • 1...g1S
        • 2.Qxg1#
      • 1...Qh5
        • 2.Qxd7#
      • 1...Bg4
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • P(a);OGATE::QAB(J),XQ(a)
    • P(a);OGATE::QAB(J),XS(a)
    • P(a);OGATE::QAB(J),XB(a)
    • P(a);OGATE::QAB(J),XR(a)
    • P(g);::QAB(J)+P(H)
  • Tries
    • Try
      • B(I);
      • Threat
        • S(C)
      • Vars
        • P(a);OGATE::QAB(J),XS(a)
        • B(i);OGATE::QAB(J),XP(h)
      • Refutation
        • Q(j);
    • Try
      • B(I);
      • Threat
        • S(C)
      • Vars
        • Q(j);N_GUARD,XB(I)::QAR(J),XB(i)
        • B(i);OGATE::QAB(J),XP(h)
        • P(g);::QAB(J)+P(H)
      • Refutation
        • P(a);
    • Try
      • B(I);XQ(j)
      • Threat
        • QAR(J),XB(i)
      • Vars
        • B(i);OGATE,XB(I)::QAB(J),XP(h)
        • B(i);OGATE::QAB(J),XP(h)
      • Refutation
        • R(k);
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::R1(B)
        • B(i);::R1(B)
      • Refutation
        • K(d);S_FLIGHT,XR(B)
    • Try
      • Q(J);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);::QAB(J)
        • R(k);::QAB(J)
        • P(b);::QAB(J)
      • Refutation
        • P(b);XQ(J)
    • Try
      • Q(J);
      • Threat
        • DUALS(6)
      • Refutation
        • P(e);XQ(J)
  • Actual
    • B(I);
    • Threat
      • S(A)
    • Vars
      • P(f);OGATE,XB(I)::R1(B),XP(f)
      • P(a);OGATE::QAB(J),XS(a)
      • Q(j);N_GUARD::QAR(J),XB(i)
      • B(i);OGATE::QAB(J),XP(h)
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