MESON Chess Problem Database

Problem Display
PID: 134409 (Q2n1BK1/1ppk2N1/4p2R/Pnp3R1/B1PN4/8/8/8 w - - 0 1)

Retter, Yosef

3rd Prize, Sunningdale TATC Ty., 2010

Q2n1BK1/1ppk2N1/4p2R/Pnp3R1/B1PN4/8/8/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qe8#
    • 1...Sf7
      • 2.Qe8#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Se5#
      • 1...Kc6
        • 2.Se5#
        • 2.Bxb5#
      • 1...Sc6
        • 2.Qe8#
      • 1...Sf7
        • 2.Qe8#
      • 1...e5
        • 2.Sxe5#
      • 1...c6!
    • 1.Sc6?
      • threat
        • 2.Se5#
      • 1...Kxc6
        • 2.Bxb5#
      • 1...Sxc6
        • 2.Qe8#
      • 1...Sf7
        • 2.Qe8#
      • 1...e5
        • 2.Sxe5#
        • 2.Qxd8#
      • 1...bxc6!
    • 1.Sgxe6?
      • threat
        • 2.Qxd8#
      • 1...Ke8
        • 2.Qxd8#
      • 1...Sxe6
        • 2.Rd5#
      • 1...Sc6
        • 2.Sxc5#
      • 1...Sf7
        • 2.Sxc5#
      • 1...cxd4!
    • 1.Bxb5+?
      • 1...Sc6
        • 2.Qe8#
      • 1...c6!
    • 1.Rxe6?
      • threat
        • 2.Rd5#
      • 1...Sc6
        • 2.Qe8#
      • 1...Sf7
        • 2.Qe8#
      • 1...c6!
  • Keys
    • 1.Sdxe6!
      • threat
        • 2.Sxc5#
      • 1...Kc6
        • 2.Bxb5#
      • 1...Sxe6
        • 2.Qe8#
      • 1...b6
        • 2.Rd5#
      • 1...c6
        • 2.Qxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(g);N_SPINS(a),OGATE::QAB1(H)
    • S(g);OGATE::QAB1(H)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • S(g);N_SPINS(a),OGATE,SBLOCK::QAB1(H)
        • S(g);OGATE::QAB1(H)
        • P(c);::S(C),XP(c)
      • Refutation
        • P(e);N_SPINS(a)
    • Try
      • S(C);N_PINS(a)
      • Threat
        • S(C)
      • Vars
        • K(f);OGATEB,P_SPINP(c),P_SPINS(a),S_FLIGHT,XS(C)::B(A),XS(a)
        • S(g);OGATE,SBLOCK,XS(C)::QAB1(H)
        • S(g);OGATE::QAB1(H)
      • Refutation
        • P(d);XS(C)
    • Try
      • S(G);XP(c)
      • Threat
        • QAR1(H),XS(g)
      • Vars
        • K(f);S_FLIGHT::QAR1(H),XS(g)
        • S(g);XS(G)::R(E)
        • S(g);N_SPINS(a)::S(G),XP(b)
        • S(g);::S(G),XP(b)
      • Refutation
        • P(b);XS(C)
    • Try
      • B(A);CHECK,XS(a)
      • Vars
        • S(g);OGATE,P_SPINS(g)::QAB1(H)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • R(F);XP(c)
      • Threat
        • R(E)
      • Vars
        • S(g);N_SPINS(a),OGATE::QAB1(H)
        • S(g);OGATE::QAB1(H)
      • Refutation
        • P(e);N_SPINS(a)
  • Actual
    • S(C);XP(c)
    • Threat
      • S(C),XP(b)
    • Vars
      • K(f);P_SPINP(d),S_FLIGHT::B(A),XS(a)
      • S(g);OGATE,XS(C)::QAB1(H)
      • P(d);::R(E)
      • P(e);N_SPINS(a),SBLOCK::QAR1(H),XS(g)
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