MESON Chess Problem Database

Problem Display
PID: 98878 (6Q1/1N6/1Kp1Pp2/pp2k3/3RP3/rn3P2/BN1B4/4n3 w - - 0 1)

Swane, Jan Arnold Willem

Problem (Zagreb), 1953

6Q1/1N6/1Kp1Pp2/pp2k3/3RP3/rn3P2/BN1B4/4n3

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd4
      • 2.Qg3#
      • 2.Qb8#
    • 1...c5
      • 2.Rd5#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sxc6#
      • 1...Kxd4
        • 2.Sxc6#
      • 1...Sxd4
        • 2.Sf7#
        • 2.Qg3#
      • 1...f5
        • 2.Qg7#
        • 2.Qh8#
      • 1...c5
        • 2.Sc6#
        • 2.Rd5#
      • 1...Sxd2!
    • 1.Be3?
      • threat
        • 2.f4#
      • 1...Sxf3
        • 2.Sd3#
      • 1...Sxd4
        • 2.Qg3#
        • 2.Qb8#
      • 1...Sg2
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...f5!
    • 1.Rd6?
      • threat
        • 2.Qg3#
      • 1...f5
        • 2.Qg7#
        • 2.Qh8#
      • 1...Sg2
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sxf3!
    • 1.Qg3+?
      • 1...Kxd4
        • 2.Qd6#
      • 1...Kxe6!
    • 1.Qd8?
      • threat
        • 2.Qd6#
      • 1...Kxe6
        • 2.Qe8#
      • 1...f5!
    • 1.Qf8?
      • threat
        • 2.Qd6#
      • 1...Kxd4
        • 2.Qd6#
        • 2.Qxf6#
      • 1...Kxe6
        • 2.Qe8#
      • 1...f5!
  • Keys
    • 1.Qb8+!
      • 1...Kxd4
        • 2.Qd6#
      • 1...Kxe6
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(g);N_GUARD::R1(E)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I),XP(g)
      • Vars
        • K(f);S_FLIGHT,XR(E)::S(I),XP(g)
      • Refutation
        • S(c);XB(C)
    • Try
      • B(C);
      • Threat
        • P(D)
      • Vars
        • S(a);N_GUARD,XP(D)::S(B)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • P(h);
    • Try
      • R(E);
      • Threat
        • QAB(J)
      • Vars
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • S(a);XP(D)
    • Try
      • Q(J);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT,XR(E)::QAR2(J)
      • Refutation
        • K(f);P-FLIGHT,P_SPINS(c),XP(H)
    • Try
      • Q(J);
      • Threat
        • QAB1(J)
      • Vars
        • K(f);OGATEB,P-FLIGHT,P_SPINS(c),XP(H)::QAR2(J)
      • Refutation
        • P(h);
    • Try
      • Q(J);
      • Threat
        • QAB1(J)
      • Vars
        • K(f);OGATEB,P-FLIGHT,P_SPINS(c),XP(H)::QAR2(J)
      • Refutation
        • P(h);
  • Actual
    • Q(J);CHECK
    • Vars
      • K(f);S_FLIGHT,XR(E)::QAR2(J)
      • K(f);OGATEB,P-FLIGHT,P_SPINS(c),XP(H)::QAR2(J)
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