MESON Chess Problem Database

Problem Display
PID: 146856 (2n5/3Q3n/K7/2p1k1pB/4P3/4P3/6R1/2B5 w - - 0 1)

Forster, Klaus

Die Schwalbe, 2012

2n5/3Q3n/K7/2p1k1pB/4P3/4P3/6R1/2B5

#2

7 + 5

5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Bb2#
    • 1...Sb6
      • 2.Qe7#
    • 1...Sd6
      • 2.Qe7#
    • 1...Sa7
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Bf7?
      • threat
        • 2.Qe6#
      • 1...Kxe4
        • 2.Qd5#
      • 1...Kf6
        • 2.Bb2#
      • 1...Sf8!
    • 1.Rf2?
      • threat
        • 2.Qd5#
      • 1...Kxe4
        • 2.Qf5#
      • 1...Sb6
        • 2.Qe7#
      • 1...Sd6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sf6!
    • 1.Rg4?
      • threat
        • 2.Bb2#
      • 1...Kf6
        • 2.Bb2#
      • 1...c4!
    • 1.Rxg5+?
      • 1...Kxe4
        • 2.Qf5#
        • 2.Qd5#
        • 2.Qxh7#
      • 1...Kf6
        • 2.Rf5#
      • 1...Sxg5!
    • 1.Qe8+?
      • 1...Kf6
        • 2.Bb2#
      • 1...Se7
        • 2.Qxe7#
      • 1...Kd6!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Qf5#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Kf6
        • 2.Bb2#
      • 1...Sd6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#

Anticipated by 225989(2002)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(b);S_FLIGHT::B(A)
    • S(e);N_GUARD::QAR2(G)
    • S(e);N_GUARD::QAR2(G),XS(e)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);P-FLIGHT,XP(D)::QAB1(G)
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • S(d);
    • Try
      • R(B);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);P-FLIGHT,XP(D)::QAB1(G)
        • S(e);N_GUARD::QAR2(G)
        • S(e);N_GUARD::QAR2(G),XS(e)
      • Refutation
        • S(d);
    • Try
      • R(B);
      • Threat
        • B(A)
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • P(a);
    • Try
      • R(B);CHECK,XP(c)
      • Vars
        • K(b);S_FLIGHT::R1(B)
      • Refutation
        • S(d);XR(B)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)
        • S(e);N_GUARD,P_SPINS(e)::QAR2(G),XS(e)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • QAR1(G)
    • Vars
      • K(b);P-FLIGHT,XP(D)::QAR2(G)
      • K(b);S_FLIGHT::B(A)
      • S(e);N_GUARD::QAR2(G)
      • S(e);N_GUARD::QAR2(G),XS(e)
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