MESON Chess Problem Database

Problem Display
PID: 119848 (3K4/1Pp5/2p2p2/Q1N1kP2/2P1n3/5R1P/5PP1/8 w - - 0 1)

van Beek, Huibrecht

Soneckcourant, 1911

3K4/1Pp5/2p2p2/Q1N1kP2/2P1n3/5R1P/5PP1/8

#2

10 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Sxe4#
    • 1...Sd6
      • 2.Qc3#
      • 2.Qa1#
  • Tries
    • 1.Sd3+?
      • 1...Kd6
        • 2.Qxc7#
      • 1...Kd4!
    • 1.Sd7+?
      • 1...Kd6
        • 2.Rd3#
        • 2.Qxc7#
      • 1...Kd4!
    • 1.Re3?
      • 1...Kd4
        • 2.Rxe4#
      • 1...Kf4
        • 2.Se6#
      • 1...Kd6
        • 2.Sxe4#
      • 1...Kxf5!
    • 1.Qd2?
      • threat
        • 2.Sd7#
      • 1...Sxf2
        • 2.Qf4#
      • 1...Sxc5
        • 2.Qf4#
      • 1...Sc3
        • 2.Qf4#
      • 1...Sg3
        • 2.Qf4#
      • 1...Sg5
        • 2.Qf4#
      • 1...Sd6
        • 2.Qc3#
        • 2.Qf4#
        • 2.Qb2#
      • 1...Sxd2!
    • 1.Qc3+?
      • 1...Kd6
        • 2.Sxe4#
        • 2.Qd4#
      • 1...Sxc3!
    • 1.Qa1+?
      • 1...Kd6
        • 2.Sxe4#
        • 2.Qd4#
      • 1...Sc3!
  • Keys
    • 1.Rf4!
      • 1...Kd4
        • 2.Rxe4#
      • 1...Kxf4
        • 2.Se6#
      • 1...Kd6
        • 2.Sxe4#
      • 1...Sxf2
        • 2.Qxc7#
      • 1...Sxc5
        • 2.Qxc7#
      • 1...Sd2
        • 2.Qxc7#
      • 1...Sc3
        • 2.Qxc7#
      • 1...Sg3
        • 2.Qxc7#
      • 1...Sg5
        • 2.Qxc7#
      • 1...Sd6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(G),XS(a)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(F),XP(e)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);P_PINS(a)
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::R1(C),XS(a)
        • K(b);N_SPINS(a),S_FLIGHT::S(G)
        • K(b);N_SPINS(a),S_FLIGHT::S(G),XS(a)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT,XP(H)
    • Try
      • Q(F);
      • Threat
        • S(G)
      • Vars
        • S(a);XP(A)::QAB1(F)
        • S(a);XS(G)::QAB1(F)
        • S(a);::QAB1(F)
      • Refutation
        • S(a);XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • S(a);XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • R(C);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::R1(C),XS(a)
      • K(b);S_FLIGHT,XR(C)::S(G)
      • K(b);S_FLIGHT::S(G),XS(a)
      • S(a);N_GUARD,XP(A)::QAB(F),XP(e)
      • S(a);N_GUARD,P_SPINS(a),XS(G)::QAB(F),XP(e)
      • S(a);N_GUARD::QAB(F),XP(e)
      • S(a);SBLOCK::QAR(F)+S(G),DCHECK
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