MESON Chess Problem Database

Problem Display
PID: 52110 (1b5q/1N1p3b/KP3Q2/R2Rn1pN/2p1k1B1/2r5/5PP1/3rn3 w - - 0 1)

van Dalfsen, Pieter Barend

1st Prize, Natationaal Najaarstoernooi, 1942

1b5q/1N1p3b/KP3Q2/R2Rn1pN/2p1k1B1/2r5/5PP1/3rn3

#2

10 + 11

102 Probleemblad 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Sg3#
    • 1...Rc2
      • 2.Sg3#
    • 1...Rg3
      • 2.Sxg3#
    • 1...Bf5
      • 2.Bxf5#
      • 2.Qxf5#
    • 1...Bg8
      • 2.Bf5#
      • 2.Qf5#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Ba7
      • 2.Sd6#
    • 1...S1d3
      • 2.Sg3#
    • 1...S1f3
      • 2.Sg3#
    • 1...S5d3
      • 2.Rd4#
    • 1...Sg6
      • 2.Bf5#
      • 2.Qf5#
  • Tries
    • 1.Qg6+?
      • 1...Sxg6
        • 2.Bf5#
      • 1...Bxg6!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Sc5#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Qc8
        • 2.Rxe5#
      • 1...S1d3
        • 2.Rd4#
      • 1...S5d3
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::S(F)
    • R(c);N_GUARD::S(F),XR(c)
    • B(j);N_GUARD::S(J),XB(j)
    • B(j);N_GUARD::S(J)
    • S(b);S_CUTR(c)::S(F)
    • S(f);S_CUTR(a)::R1(E)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • S(f);XQ(I)::B(C)
      • Refutation
        • B(i);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • S(J)
    • Vars
      • R(a);OGATE,XR(E)::QAB1(I),XR(a)
      • B(j);XQ(I)::S(J),XB(j)
      • Q(k);N_GUARD,P_PINS(J)::R1(E),XS(f)
      • S(b);S_CUTR(a)::R1(E)
      • S(f);S_CUTR(c)::S(F)
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