MESON Chess Problem Database

Problem Display
PID: 196312 (3B4/8/5b2/4Np1K/2Np1k1n/1B2p1p1/8/6Q1 w - - 0 1)

Dewald, JWP

Haagsche Courant, 1898

3B4/8/5b2/4Np1K/2Np1k1n/1B2p1p1/8/6Q1

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qxd4#
    • 1...d3
      • 2.Qxe3#
  • Tries
    • 1.Qf1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Ke4!
    • 1.Qg2?
      • threat
        • 2.Sd3#
      • 1...Bxe5
        • 2.Bg5#
      • 1...Sf3
        • 2.Qxf3#
      • 1...d3
        • 2.Sxd3#
      • 1...Sxg2!
    • 1.Qxg3+?
      • 1...Ke4
        • 2.Sd6#
      • 1...Kxg3!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sd3#
      • 1...Kxe5
        • 2.Bc7#
      • 1...Bxe5
        • 2.Bg5#
      • 1...exd2
        • 2.Qxd4#
      • 1...g2
        • 2.Qh2#
      • 1...d3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE::QAR2(A),XP(c)
    • P(c);N_GUARD::QAB1(A),XP(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(A),XS(e)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • S(D)
      • Vars
        • B(g);OGATE,XS(D)::B(F)
        • S(e);N_GUARD::QAR1(A),XS(e)
        • P(c);::S(D),XP(c)
      • Refutation
        • S(e);XQ(A)
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(d);P-FLIGHT::S(C)
      • Refutation
        • K(d);S_FLIGHT,XQ(A)
  • Actual
    • S(C);
    • Threat
      • S(D)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(D)::B(F)
      • B(g);OGATE,SBLOCK,XS(D)::B(F)
      • P(a);OGATE,XS(C)::QAR2(A),XP(c)
      • P(b);OGATEB::QAB(A)
      • P(c);::S(D),XP(c)
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