MESON Chess Problem Database

Problem Display
PID: 96967 (b7/4p1Q1/4p1P1/3NBkpp/1qR1r1R1/4p1nP/r1n1N1K1/1B2b3 w - - 0 1)

Froberg, Johan Hilding Laurentius

Jonsson, Christer

Problemas, 1994

b7/4p1Q1/4p1P1/3NBkpp/1qR1r1R1/4p1nP/r1n1N1K1/1B2b3

#2

10 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sxe7#
    • 1...Qc3
      • 2.Sxe7#
    • 1...Qa5
      • 2.Sxe7#
    • 1...Qxb1
      • 2.Sxe7#
    • 1...Qb2
      • 2.Sxe7#
    • 1...Qb3
      • 2.Sxe7#
    • 1...Qa4
      • 2.Sxe7#
    • 1...Qxc4
      • 2.Sxe7#
    • 1...Qb5
      • 2.Sxe7#
    • 1...Qb6
      • 2.Sxe7#
    • 1...Qb8
      • 2.Sxe7#
    • 1...Rd4
      • 2.Sxd4#
    • 1...Rxe5
      • 2.Sd4#
      • 2.Qf7#
    • 1...Bd2
      • 2.Sxg3#
    • 1...Bc3
      • 2.Sxg3#
    • 1...Sa1
      • 2.Sxe3#
    • 1...Sa3
      • 2.Sxe3#
    • 1...Sd4
      • 2.Sxe3#
  • Tries
    • 1.Bb2?
      • threat
        • 2.Qf7#
      • 1...Qxb2
        • 2.Sxe7#
      • 1...Qc3
        • 2.Sxe7#
      • 1...Rd4
        • 2.Sxd4#
      • 1...Bc3
        • 2.Sxg3#
      • 1...Sd4
        • 2.Sxd4#
        • 2.Sxe3#
      • 1...Rxb2!
    • 1.Bd6?
      • threat
        • 2.Sxe7#
        • 2.Qf7#
      • 1...Rxc4
        • 2.Qf7#
      • 1...Rxg4
        • 2.Qf7#
      • 1...Bxd5
        • 2.Qf7#
      • 1...exd5
        • 2.Qf7#
      • 1...exd6
        • 2.Se7#
        • 2.Qf6#
      • 1...e5
        • 2.Qf7#
      • 1...Qc3
        • 2.Sxe7#
      • 1...Qb2
        • 2.Sxe7#
      • 1...Qb7
        • 2.Qf7#
      • 1...Ra7
        • 2.Qf7#
      • 1...Rd4
        • 2.Sxd4#
        • 2.Qf7#
      • 1...Rf4
        • 2.Qf7#
      • 1...Re5
        • 2.Sd4#
        • 2.Qf7#
      • 1...Bc3
        • 2.Sxg3#
        • 2.Sxe7#
      • 1...Qxd6!
    • 1.Bc7?
      • threat
        • 2.Qf7#
      • 1...Qc3
        • 2.Sxe7#
      • 1...Qb2
        • 2.Sxe7#
      • 1...Bc3
        • 2.Sxg3#
      • 1...Qd6!
    • 1.Bb8?
      • threat
        • 2.Qf7#
      • 1...Qxb8
        • 2.Sxe7#
      • 1...Qc3
        • 2.Sxe7#
      • 1...Qb2
        • 2.Sxe7#
      • 1...Bc3
        • 2.Sxg3#
      • 1...Qd6!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qf7#
      • 1...Qxc3
        • 2.Sxe7#
      • 1...Bxc3
        • 2.Sxg3#
      • 1...Rd4
        • 2.Sxd4#
      • 1...Sd4
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 13
  • Sets
    • Q(f);N_GUARD,P_PINS(B)::S(G),XP(l)
    • Q(f);N_GUARD::S(G),XP(l)
    • Q(f);N_GUARD,XB(A)::S(G),XP(l)
    • Q(f);N_GUARD,XR(E)::S(G),XP(l)
    • R(g);N_GUARD,P_PINS(G),P_SPINS(c)::S(B),XR(g)
    • B(a);N_GUARD::S(B),XS(e)
    • S(c);N_GUARD,P_PINS(B),P_SPINR(g)::S(G),XP(d)
  • Tries
    • Try
      • B(H);
      • Threat
        • QAR2(J)
      • Vars
        • Q(f);N_GUARD,XB(H)::S(G),XP(l)
        • Q(f);N_GUARD::S(G),XP(l)
        • R(g);N_GUARD,P_PINS(G),P_SPINS(c)::S(B),XR(g)
        • B(a);N_GUARD::S(B),XS(e)
      • Refutation
        • R(b);XB(H)
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);P_PINS(G),P_SPINS(c),XR(E)::QAR2(J)
        • R(g);P_PINS(G),P_SPINS(c),XR(F)::QAR2(J)
        • B(m);XS(G)::QAR2(J)
        • P(k);XS(G)::QAR2(J)
        • P(k);::QAR2(J)
        • Q(f);::S(G),XP(l)
        • Q(f);::QAR2(J)
        • R(b);::QAR2(J)
        • R(g);P_PINS(G),P_SPINS(c)::QAR2(J)
      • Refutation
        • Q(f);XB(H)
    • Try
      • B(H);
      • Threat
        • QAR2(J)
      • Vars
        • Q(f);N_GUARD::S(G),XP(l)
        • B(a);N_GUARD::S(B),XS(e)
      • Refutation
        • Q(f);
    • Try
      • B(H);
      • Threat
        • QAR2(J)
      • Vars
        • Q(f);N_GUARD,XB(H)::S(G),XP(l)
        • Q(f);N_GUARD::S(G),XP(l)
        • B(a);N_GUARD::S(B),XS(e)
      • Refutation
        • Q(f);
  • Actual
    • B(H);
    • Threat
      • QAR2(J)
    • Vars
      • Q(f);N_GUARD,XB(H)::S(G),XP(l)
      • B(a);N_GUARD,XB(H)::S(B),XS(e)
      • R(g);N_GUARD,P_PINS(G),P_SPINS(c)::S(B),XR(g)
      • S(c);N_GUARD,P_PINS(B),P_SPINR(g)::S(G),XP(d)
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