MESON Chess Problem Database

Problem Display
PID: 90792 (1n2n2K/1N2Q1pN/q1P1p3/3pkp1b/1R2P3/2P3P1/4B3/4R3 w - - 0 1)

Haring, Jacobus

Die Schwalbe, 1968

1n2n2K/1N2Q1pN/q1P1p3/3pkp1b/1R2P3/2P3P1/4B3/4R3

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Qxd6#
      • 2.Qxg7#
    • 1...Sf6
      • 2.Qd6#
      • 2.Qc7#
    • 1...Sc7
      • 2.Qd6#
      • 2.Qxc7#
      • 2.Qxg7#
    • 1...dxe4
      • 2.Qc5#
    • 1...fxe4
      • 2.Qg5#
    • 1...f4
      • 2.Qg5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qxe6#
      • 1...Qxc6
        • 2.Sd3#
      • 1...Qc8
        • 2.Sd3#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Bf7!
    • 1.Sg5?
      • threat
        • 2.Qxe6#
      • 1...Bf7
        • 2.Sf3#
        • 2.Sxf7#
      • 1...Sc7
        • 2.Qxg7#
      • 1...Qxc6!
    • 1.Qc7+?
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qxg7#
      • 1...Sxc7!
    • 1.Qxg7+?
      • 1...Sf6
        • 2.Qxf6#
        • 2.Qc7#
      • 1...Sxg7!
    • 1.exf5?
      • threat
        • 2.Qxe6#
      • 1...Kxf5
        • 2.Qg5#
      • 1...Qxc6
        • 2.Bg4#
      • 1...Bf7
        • 2.Bd3#
      • 1...Sc7!
  • Keys
    • 1.exd5!
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qc5#
      • 1...Qxc6
        • 2.Bf3#
      • 1...Bf7
        • 2.Bc4#
      • 1...Sc7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • P(a);OGATEB,XP(F)::QAR2(I)
    • P(c);OGATEB,XP(F)::QAR2(I)
    • P(c);OGATEB::QAR2(I)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR1(I),XP(f)
      • Vars
        • Q(e);N_GUARD,XP(G)::S(H)
        • Q(e);N_GUARD::S(H)
        • S(i);N_GUARD::QAB(I),XS(i)
      • Refutation
        • B(d);
    • Try
      • S(J);
      • Threat
        • QAR1(I),XP(f)
      • Vars
        • S(i);N_GUARD::QAB(I),XP(g)
      • Refutation
        • Q(e);XP(G)
    • Try
      • Q(I);CHECK,N_PINP(f)
      • Refutation
        • S(i);XQ(I)
    • Try
      • Q(I);CHECK,N_PINP(f),XP(g)
      • Refutation
        • S(i);XQ(I)
    • Try
      • P(F);XP(c)
      • Threat
        • QAR1(I),XP(f)
      • Vars
        • K(b);N_SPINP(f),OGATEB,P-FLIGHT,XP(F)::QAR1(I)
        • Q(e);N_GUARD,XP(G)::R(A)+B(B)
        • B(d);N_GUARD::R(A)+B(B)
      • Refutation
        • S(i);
  • Actual
    • P(F);XP(a)
    • Threat
      • QAR1(I),XP(f)
    • Vars
      • K(b);N_SPINP(f),OGATEB,P-FLIGHT,XP(F)::QAR1(I)
      • Q(e);N_GUARD,XP(G)::R(A)+B(B)
      • B(d);N_GUARD::R(A)+B(B)
      • S(i);N_GUARD::QAB1(I)
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