MESON Chess Problem Database

Problem Display
PID: 216425 (8/2rn1p2/2pN1p2/3k1N2/p3Rb2/7B/K1Q5/5bB1 w - - 0 1)

Sydenham, Colin Peter

diagrammes, 1975

8/2rn1p2/2pN1p2/3k1N2/p3Rb2/7B/K1Q5/5bB1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qd3#
      • 2.Qc4#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bxh3
      • 2.Qd3#
      • 2.Qc4#
    • 1...Bc4+
      • 2.Qxc4#
    • 1...Bxd6
      • 2.Se3#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
    • 1...Sf8
      • 2.Qc5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Se7#
      • 1...Bxc4+
        • 2.Qxc4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Be3
        • 2.Scxe3#
      • 1...Bd6
        • 2.Sce3#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sb8
        • 2.Sb6#
      • 1...Sf8
        • 2.Sb6#
      • 1...Se5!
    • 1.Rd4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Ke6!
    • 1.Re7?
      • threat
        • 2.Qe4#
      • 1...Bc4+
        • 2.Qxc4#
      • 1...Bg2
        • 2.Bxg2#
        • 2.Qd3#
        • 2.Qxg2#
        • 2.Qc4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Be3!
    • 1.Re8?
      • threat
        • 2.Qe4#
      • 1...Bc4+
        • 2.Qxc4#
      • 1...Bg2
        • 2.Bxg2#
        • 2.Qd3#
        • 2.Qxg2#
        • 2.Qc4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Be3!
    • 1.Qd1+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bd2!
    • 1.Qb3+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...axb3+!
    • 1.Qd2+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxd2!
  • Keys
    • 1.Se8!
      • threat
        • 2.Se7#
      • 1...Bc4+
        • 2.Qxc4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Se5
        • 2.Sxc7#
      • 1...Bd6
        • 2.Se3#
      • 1...Sc5
        • 2.Sxf6#
      • 1...Sb6
        • 2.Sxf6#
      • 1...Sb8
        • 2.Sxf6#
      • 1...Sf8
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR2(C),XB(a)
    • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
    • B(c);N_GUARD,SBLOCK,XS(G)::S(F)
    • S(h);N_GUARD::QAR1(C),XS(h)
    • S(h);N_GUARD::QAR1(C)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(F)
      • Vars
        • B(a);CHECK,OGATE,XS(G)::QAB1(C),XB(a)
        • B(a);N_GUARD::QAR2(C),XB(a)
        • B(c);N_GUARD::S(G),XB(c)
        • B(c);N_GUARD::S(G)
        • S(h);N_GUARD::S(G)
        • S(h);N_GUARD::S(G),XS(h)
      • Refutation
        • S(h);
    • Try
      • R(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(E);
      • Threat
        • QAB1(C)
      • Vars
        • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
        • B(a);N_GUARD::QAR2(C),XB(a)
        • S(h);N_GUARD::QAR1(C),XS(h)
      • Refutation
        • B(c);
    • Try
      • R(E);
      • Threat
        • QAB1(C)
      • Vars
        • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
        • B(a);N_GUARD::QAR2(C),XB(a)
        • S(h);N_GUARD::QAR1(C),XS(h)
      • Refutation
        • B(c);
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(C),XB(a)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_PINQ(C),P_SPINB(a)::QAB1(C),XB(a)
      • Refutation
        • P(b);CHECK,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(C),XB(a)
      • Refutation
        • B(c);XQ(C)
  • Actual
    • S(G);
    • Threat
      • S(F)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
      • B(a);N_GUARD::QAR2(C),XB(a)
      • S(h);S_CUTB(c)::S(G),XR(g)
      • B(c);N_GUARD::S(F)
      • S(h);N_GUARD::S(G),XP(f)
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