MESON Chess Problem Database

Problem Display
PID: 18918 (1K2RR2/1B6/4N2B/3N4/Q2PkPp1/2p3rp/3n1ppb/4r3 w - - 0 1)

Drese, Gerardus Hendrikus

1st Prize, Israel Ring Ty., 1959

1K2RR2/1B6/4N2B/3N4/Q2PkPp1/2p3rp/3n1ppb/4r3

#2

10 + 10

5862 An ABC of Chess Problems 1970
102 Probleemblad 1975
273 Mat Plus 1994
721 Variantim 2005
133 The Problemist Supplement 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sc5#
    • 1...Kf3
      • 2.Sg5#
    • 1...Ree3
      • 2.Sb4#
    • 1...Rd3
      • 2.Sg5#
    • 1...Rge3
      • 2.Sb4#
    • 1...Rf3
      • 2.Sc5#
    • 1...Sf3
      • 2.Sc5#
      • 2.Qc2#
  • Tries
    • 1.Sb6+?
      • 1...Kd3
        • 2.Sc5#
      • 1...Ke3!
    • 1.Sdc7+?
      • 1...Kd3
        • 2.Sc5#
      • 1...Ke3!
    • 1.Qc2+?
      • 1...Kf3
        • 2.Sg5#
      • 1...Rd3!
    • 1.Qc4?
      • threat
        • 2.Sg5#
      • 1...Kf3
        • 2.Sg5#
      • 1...Sxc4!
  • Keys
    • 1.f5!
      • threat
        • 2.Sb4#
      • 1...Rd3+
        • 2.Sdc7#
      • 1...Rge3+
        • 2.Sdf4#
      • 1...Rf3+
        • 2.Sef4#
      • 1...Kd3
        • 2.Sef4#
        • 2.Sc5#
      • 1...Kf3
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • K(i);S_FLIGHT::S(E)
    • R(a);SBLOCK::B(G)+S(D)
    • R(g);P_PINP(C),SBLOCK::R(I)+S(E),DCHECK
    • R(g);P_PINP(C),SBLOCK::B(G)+S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(i);S_FLIGHT::S(E)
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(i);S_FLIGHT::S(E)
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(i);S_FLIGHT::S(E)
      • Refutation
        • R(g);P_PINP(C),P_SPINR(g)
    • Try
      • Q(A);
      • Threat
        • R(I)+S(E),DCHECK
      • Vars
        • K(i);S_FLIGHT::S(E)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • P(C);
    • Threat
      • B(G)+S(D)
    • Vars
      • R(g);CHECK,SBLOCK::B(G)+S(D)
      • R(g);CHECK,SBLOCK::R(I)+S(E)
      • K(i);S_FLIGHT::S(E)
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