MESON Chess Problem Database

Problem Display
PID: 173624 (3RBK2/5P2/1PQ5/2p2N2/Rq1P4/1p1k4/NP2pP2/2B1n3 w - - 0 1)

Boros, Sandor

2nd Prize, Die Schwalbe, 1938

3RBK2/5P2/1PQ5/2p2N2/Rq1P4/1p1k4/NP2pP2/2B1n3

#2

13 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb5#
    • 1...cxd4+
      • 2.Sxb4#
    • 1...c4+
      • 2.Sxb4#
  • Tries
    • 1.Sxb4+?
      • 1...Kc4
        • 2.Se3#
        • 2.Qb5#
        • 2.Qd5#
        • 2.Qxc5#
        • 2.Qe6#
      • 1...cxb4!
    • 1.Se3?
      • threat
        • 2.Qg6#
      • 1...cxd4+
        • 2.Sxb4#
      • 1...c4+
        • 2.Sxb4#
      • 1...Qxb6!
    • 1.Qe4+?
      • 1...Kc4
        • 2.Se3#
        • 2.Sd6#
        • 2.d5#
      • 1...Kxe4!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Se3#
      • 1...cxd4+
        • 2.Sd6#
      • 1...c4+
        • 2.Se7#
      • 1...Kc2
        • 2.Se3#
      • 1...Kc4
        • 2.Se3#
      • 1...Ke4
        • 2.Sh4#
      • 1...Qxb6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);P_SPINP(f),P_SPINQ(e),S_FLIGHT::QAB1(I)
    • P(f);CHECK,N_GUARD,P_SPINP(f),XP(F)::S(B),XQ(e)
    • P(f);CHECK,N_GUARD::S(B),XQ(e)
  • Tries
    • Try
      • S(B);CHECK,XQ(e)
      • Refutation
        • P(f);XS(B)
    • Try
      • S(G);
      • Threat
        • QAB(I)
      • Vars
        • P(f);CHECK,N_GUARD,P_SPINP(f),XP(F)::S(B),XQ(e)
        • P(f);CHECK,N_GUARD::S(B),XQ(e)
      • Refutation
        • Q(e);XP(H)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(d);S_FLIGHT,XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+S(G)
    • Vars
      • P(f);CHECK,P_SPINP(f),SBLOCK,XP(F)::QAB(I)+S(G)
      • P(f);CHECK,SBLOCK::QAB(I)+S(G)
      • K(d);S_FLIGHT::QAB(I)+S(G),DCHECK
      • K(d);P_SPINQ(e),S_FLIGHT::S(G)
      • K(d);S_FLIGHT::QAB(I)+S(G)
      • Q(e);XP(H)::QAB(I)+S(G)
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