MESON Chess Problem Database

Problem Display
PID: 7839 (5n2/R4p1Q/P3N1r1/1PNkP3/2p3bR/2p1K3/7B/8 w - - 0 1)

le Grand, Henk

le Grand, Piet

1st HM., Koldijk JT, 1994

5n2/R4p1Q/P3N1r1/1PNkP3/2p3bR/2p1K3/7B/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Qe4#
    • 1...Rf6
      • 2.Qe4#
    • 1...Rh6
      • 2.Qe4#
    • 1...Rg7
      • 2.Qe4#
    • 1...Rg8
      • 2.Qe4#
    • 1...Bd1
      • 2.Rd4#
    • 1...Be2
      • 2.Rd4#
    • 1...Bf3
      • 2.Rd4#
    • 1...Bh3
      • 2.Rd4#
    • 1...Bf5
      • 2.Rd4#
    • 1...Bh5
      • 2.Rd4#
    • 1...Sd7
      • 2.Rxd7#
    • 1...Sxh7
      • 2.Rd7#
    • 1...f5
      • 2.Qb7#
    • 1...f6
      • 2.Qb7#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Sc7#
      • 1...Kxe6
        • 2.Qxf7#
      • 1...Rxe6
        • 2.Qe4#
      • 1...Bxe6
        • 2.Rd4#
      • 1...Sxe6
        • 2.Rd7#
      • 1...fxe6
        • 2.Qb7#
      • 1...cxb3!
    • 1.Sd3?
      • threat
        • 2.Sef4#
        • 2.Sc7#
      • 1...Kxe6
        • 2.Qxf7#
      • 1...Rxe6
        • 2.Qe4#
      • 1...Bxe6
        • 2.Rd4#
      • 1...Sxe6
        • 2.Rd7#
      • 1...fxe6
        • 2.Qb7#
      • 1...Rf6
        • 2.Sc7#
      • 1...cxd3!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc7#
      • 1...Kxe6
        • 2.Qxf7#
      • 1...Rxe6
        • 2.Qe4#
      • 1...Bxe6
        • 2.Rd4#
      • 1...Sxe6
        • 2.Rd7#
      • 1...fxe6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 15
  • Sets
    • R(e);OGATE::QAB1(J)
    • B(c);OGATE::R1(C)
    • S(g);N_GUARD::R(I),XS(g)
    • S(g);N_GUARD,XQ(J)::R(I)
    • P(f);OGATE::QAB(J)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(H)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(H)::QAB1(J),XP(f)
        • R(e);OGATE,P_PINP(F),SBLOCK,XS(H)::QAB1(J)
        • B(c);OGATE,SBLOCK,XS(H)::R1(C)
        • S(g);N_GUARD,SBLOCK,XS(H)::R(I)
        • P(f);OGATE,SBLOCK,XS(H)::QAB(J)
      • Refutation
        • P(b);XS(E)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(H)::QAB1(J),XP(f)
        • R(e);OGATE,P_PINP(F),SBLOCK,XS(H)::QAB1(J)
        • B(c);OGATE,SBLOCK,XS(H)::R1(C)
        • S(g);N_GUARD,SBLOCK,XS(H)::R(I)
        • P(f);OGATE,SBLOCK,XS(H)::QAB(J)
        • R(e);::S(H)
      • Refutation
        • P(b);XS(E)
  • Actual
    • S(E);
    • Threat
      • S(H)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(H)::QAB1(J),XP(f)
      • R(e);OGATE,P_PINP(F),SBLOCK,XS(H)::QAB1(J)
      • B(c);OGATE,SBLOCK,XS(H)::R1(C)
      • S(g);N_GUARD,SBLOCK,XS(H)::R(I)
      • P(f);OGATE,SBLOCK,XS(H)::QAB(J)
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