MESON Chess Problem Database

Problem Display
PID: 243382 (3r2B1/p4r2/5P2/pQPN3R/P2k1P2/5RNn/3Pp3/1K2nbb1 w - - 0 1)

van Dooren, Rene

The Problemist, 1989

3r2B1/p4r2/5P2/pQPN3R/P2k1P2/5RNn/3Pp3/1K2nbb1

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.dxe3#
    • 1...Sc2
      • 2.Rd3#
    • 1...Sg2
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
    • 1...Sxf4
      • 2.Rxf4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qc4#
      • 1...Rb7
        • 2.Sef5#
      • 1...Rb8
        • 2.Rd5#
      • 1...Bxe3!
    • 1.Sb6?
      • threat
        • 2.Qc4#
        • 2.Qb2#
      • 1...Sxf3
        • 2.Qc4#
      • 1...Rd5
        • 2.Rxd5#
        • 2.Qc4#
      • 1...Be3
        • 2.Qc4#
      • 1...Sd3
        • 2.Rxd3#
        • 2.Qxd3#
        • 2.Qc4#
      • 1...Sg5
        • 2.Qc4#
      • 1...axb6!
    • 1.Re5?
      • threat
        • 2.Sf5#
      • 1...Rxf6
        • 2.Re4#
      • 1...Sxf4!
    • 1.Qb2+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kxc5!
    • 1.d3?
      • threat
        • 2.Qc4#
      • 1...Sxd3
        • 2.Rxd3#
      • 1...Rb7
        • 2.Sf5#
      • 1...Rb8!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Sf5#
      • 1...Rxf6
        • 2.Qc4#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Rd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(c);OGATE::P(B),XB(c)
    • S(a);N_GUARD::R1(C)
    • S(a);N_GUARD::R1(C),XS(a)
    • S(e);OGATE,XP(F)::R(C),XS(e)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAR1(G)
      • Vars
        • R(i);P_PINQ(G)::S(I)
        • R(j);N_GUARD,P_PINQ(G)::R1(J)
      • Refutation
        • B(c);XS(I)
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XR(C)::QAR1(G)
        • B(c);::QAR1(G)
        • S(e);::QAR1(G)
      • Refutation
        • P(h);XS(I)
    • Try
      • R(J);
      • Threat
        • S(D)
      • Vars
        • R(i);XP(K)::R1(J)
      • Refutation
        • S(e);XP(F)
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR1(G)
      • Refutation
        • K(f);S_FLIGHT,XP(H)
    • Try
      • P(B);
      • Threat
        • QAR1(G)
      • Vars
        • S(a);OGATE,XP(B)::R1(C),XS(a)
        • R(i);P_PINQ(G)::S(D)
      • Refutation
        • R(j);P_PINQ(G)
  • Actual
    • S(I);
    • Threat
      • S(D)
    • Vars
      • R(i);XP(K)::QAR1(G)
      • S(e);OGATE,XP(F)::R(C),XS(e)
      • R(j);N_GUARD::R1(J),XR(j)
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