MESON Chess Problem Database

Problem Display
PID: 101333 (3r4/p4QB1/K1p4p/3PN1N1/1P1kq1nR/1Pn5/3Ppb2/8 w - - 0 1)

Madsen, Arthur Valdemar

4th HM., Good Companions (November), 1919

3r4/p4QB1/K1p4p/3PN1N1/1P1kq1nR/1Pn5/3Ppb2/8

#2

10 + 10

3391 Het Half Pin Thema 1924
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3+
      • 2.Sc4#
    • 1...Qxd5
      • 2.Qxf2#
    • 1...Rxd5
      • 2.Se6#
    • 1...Sxd5
      • 2.Se6#
    • 1...Se3
      • 2.Sgf3#
    • 1...Sf6
      • 2.Sgf3#
    • 1...cxd5
      • 2.Se6#
      • 2.Qxa7#
  • Tries
    • 1.Qxa7+?
      • 1...c5
        • 2.Qxc5#
      • 1...Kxd5!
    • 1.dxc6?
      • threat
        • 2.Qc4#
      • 1...Qd3+
        • 2.Sc4#
      • 1...Sf6
        • 2.Sgf3#
      • 1...Qd5
        • 2.Qxf2#
      • 1...Rd5
        • 2.Se6#
      • 1...Sd5
        • 2.Se6#
      • 1...Se3
        • 2.Sgf3#
      • 1...Qxc6+!
  • Keys
    • 1.d6!
      • threat
        • 2.Qc4#
      • 1...Qd3+
        • 2.Sc4#
      • 1...Sf6
        • 2.Sgf3#
      • 1...Qd5
        • 2.Qxf2#
      • 1...Sd5
        • 2.Se6#
      • 1...Se3
        • 2.Sgf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(e);CHECK,N_GUARD,P_SPINS(f),SBLOCK::B(J)+S(F)
    • Q(e);N_GUARD,P_SPINS(f),SBLOCK,XP(E)::QAB(I),XB(b)
    • R(j);SBLOCK,XP(E)::S(G)
    • S(c);SBLOCK,XP(E)::S(G)
    • S(f);P_SPINQ(e)::S(G)
  • Tries
    • Try
      • Q(I);CHECK,XP(i)
      • Vars
        • P(g);P_SPINP(g)::QAB1(I),XP(g)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
    • Try
      • P(E);XP(g)
      • Threat
        • QAR1(I)
      • Vars
        • Q(e);CHECK,N_GUARD,P_SPINS(f),SBLOCK::B(J)+S(F)
        • S(f);P_SPINQ(e)::S(G)
        • Q(e);N_GUARD,P_SPINS(f),SBLOCK::QAB(I),XB(b)
        • R(j);SBLOCK::S(G)
        • S(c);SBLOCK::S(G)
      • Refutation
        • Q(e);CHECK,P_SPINS(f),XP(E)
  • Actual
    • P(E);
    • Threat
      • QAR1(I)
    • Vars
      • Q(e);CHECK,N_GUARD,P_SPINS(f),SBLOCK::B(J)+S(F)
      • S(f);P_SPINQ(e)::S(G)
      • Q(e);N_GUARD,P_SPINS(f),SBLOCK::QAB(I),XB(b)
      • S(c);SBLOCK::S(G)
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