MESON Chess Problem Database

Problem Display
PID: 202434 (q7/P2Q3p/b2N4/3ppp2/1P1k4/7R/2P2P2/bB1nB2K w - - 0 1)

van Dijk, Johannes

Algemeen Handelsblad, 1923

q7/P2Q3p/b2N4/3ppp2/1P1k4/7R/2P2P2/bB1nB2K

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa7
      • 2.Qxa7#
    • 1...Bd3
      • 2.Rxd3#
    • 1...Bb7
      • 2.Rd3#
    • 1...Bc8
      • 2.Rd3#
    • 1...Sb2
      • 2.Bc3#
      • 2.c3#
    • 1...Sxf2+
      • 2.Bxf2#
    • 1...Se3
      • 2.fxe3#
    • 1...e4
      • 2.Qg7#
  • Tries
    • 1.Sxf5+?
      • 1...Kc4
        • 2.Ba2#
      • 1...Ke4!
    • 1.Rh4+?
      • 1...e4
        • 2.Qg7#
      • 1...f4!
  • Keys
    • 1.c4!
      • threat
        • 2.Rd3#
      • 1...Sxf2+
        • 2.Bxf2#
      • 1...dxc4+
        • 2.Sb7#
      • 1...Bxc4
        • 2.Sxf5#
      • 1...e4
        • 2.Qg7#
      • 1...Sb2
        • 2.Bc3#
      • 1...Se3
        • 2.fxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(i);OGATE,XP(I)::QAB(J),XQ(i)
    • B(g);N_GUARD::R1(F),XB(g)
    • B(g);N_GUARD::R1(F)
    • S(b);CHECK,OGATE,XP(E)::B(B),XS(b)
    • S(b);OGATE::P(E),XS(b)
    • P(e);OGATEB::QAB(J)
  • Tries
    • Try
      • S(H);CHECK,P_PINP(d),XP(f)
      • Vars
        • K(c);N_SPINP(d),P-FLIGHT::B(A)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • P(e);P_SPINP(e),S_CUTP(f)::QAB(J)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • P(D);
    • Threat
      • R1(F)
    • Vars
      • S(b);CHECK,OGATE,XP(E)::B(B),XS(b)
      • P(d);CHECK,SBLOCK,XP(D)::QAR(J)+S(H)
      • B(g);SBLOCK,XP(D)::S(H),XP(f)
      • P(e);OGATEB::QAB(J)
      • S(b);N_GUARD,S_CUTB(a)::B(B)
      • S(b);OGATE::P(E),XS(b)
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