MESON Chess Problem Database

Problem Display
PID: 108649 (2BR4/3qpP2/2p1NBK1/2P1p1P1/1Np1kpR1/2n2pP1/1Qb2P2/8 w - - 0 1)

Klar, Eugene

Bulletin de la FFE, 1935

2BR4/3qpP2/2p1NBK1/2P1p1P1/1Np1kpR1/2n2pP1/1Qb2P2/8

#2

13 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Qxc2#
    • 1...Qxc8
      • 2.Qxc2#
    • 1...Qe8
      • 2.Qxc2#
    • 1...Qa7
      • 2.Qxc2#
    • 1...Qb7
      • 2.Qxc2#
    • 1...Qc7
      • 2.Qxc2#
    • 1...Sb1
      • 2.Qxe5#
    • 1...Sd1
      • 2.Qxe5#
    • 1...Sa2
      • 2.Qxe5#
    • 1...Se2
      • 2.Qxe5#
    • 1...Sa4
      • 2.Qxe5#
    • 1...Sb5
      • 2.Qxe5#
    • 1...Sd5
      • 2.Qxe5#
      • 2.Qxc2#
  • Tries
    • 1.Qxc3?
      • threat
        • 2.Qe1#
        • 2.Qxe5#
        • 2.Qe3#
      • 1...Qxe6
        • 2.Qe1#
        • 2.Qxc2#
        • 2.Qe3#
      • 1...exf6
        • 2.Qe1#
        • 2.Qe3#
      • 1...Qd1
        • 2.Qxe5#
        • 2.Qe3#
      • 1...Qd2
        • 2.Qxe5#
      • 1...Qd3
        • 2.Qxe5#
      • 1...Qd5
        • 2.Qe1#
        • 2.Qe3#
      • 1...Qd6
        • 2.Qe1#
        • 2.Qe3#
      • 1...Qc7
        • 2.Qe1#
        • 2.Qxc2#
        • 2.Qe3#
        • 2.Qxc4#
      • 1...Bd1
        • 2.Qxe5#
        • 2.Qe3#
      • 1...Bd3
        • 2.Qxe5#
      • 1...Qd4!
    • 1.gxf4?
      • threat
        • 2.fxe5#
        • 2.f5#
      • 1...Qxe6
        • 2.Qxc2#
        • 2.f5#
      • 1...exf4
        • 2.Rxf4#
      • 1...exf6
        • 2.f5#
      • 1...Se2
        • 2.Qxe5#
      • 1...Sd5
        • 2.Qxe5#
        • 2.Qxc2#
      • 1...Qd2!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Se6#
      • 1...Kd4+
        • 2.Sfd3#
      • 1...Qf5+
        • 2.Bxf5#
      • 1...Qxg4
        • 2.Qxc2#
      • 1...exf4
        • 2.Rxf4#
      • 1...Qe6
        • 2.Sxe6#
        • 2.Qxc2#
      • 1...Qd2
        • 2.Bf5#
      • 1...Se2
        • 2.Qxe5#
      • 1...Sd5
        • 2.Qxe5#
      • 1...e6
        • 2.Se2#
        • 2.Sg2#
        • 2.Sfd3#
        • 2.Sh3#
        • 2.Sfd5#
        • 2.Sh5#
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 11
  • Sets
    • Q(i);N_GUARD,P_PINB(I),XS(H)::QAB(A),XB(a)
    • Q(i);N_GUARD,XB(L)::QAB(A),XB(a)
    • Q(i);N_GUARD,P_PINP(K)::QAB(A),XB(a)
    • Q(i);N_GUARD::QAB(A),XB(a)
    • S(b);OGATE::QAR1(A),XP(g)
  • Tries
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(3)
      • Vars
        • Q(i);::QAR1(A),XP(g)
        • B(a);::QAR1(A),XP(g)
      • Refutation
        • Q(i);
    • Try
      • P(C);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(g);OGATE,P_SPINP(g),XP(C)::R1(E),XP(g)
        • P(j);XB(I)::R(E)+P(C)
        • S(b);OGATE::QAR1(A),XP(g)
      • Refutation
        • Q(i);
  • Actual
    • S(H);XP(f)
    • Threat
      • R(E)+S(H)
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINP(g),P_SPINQ(i),P_SPINS(b)::R(E)+S(H)
      • Q(i);CHECK,OGATE::B(L),XQ(i)
      • Q(i);N_GUARD,P_PINP(G),XR(E)::QAB(A),XB(a)
      • P(g);OGATE,P_SPINP(g),XS(H)::R1(E),XP(g)
      • Q(i);OGATE::B(L)
      • S(b);OGATE::QAR1(A),XP(g)
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