MESON Chess Problem Database

Problem Display
PID: 176273 (7n/2K3Q1/1PNP4/1pk1N2R/n3Pp2/bbq5/2B5/1R2B3 w - - 0 1)

Lohr, Karl-Josef

Schach-Echo, 1972

7n/2K3Q1/1PNP4/1pk1N2R/n3Pp2/bbq5/2B5/1R2B3

#2

11 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Bf2#
      • 2.Qg1#
    • 1...Qc4
      • 2.Sd3#
      • 2.Sd7#
    • 1...Bc4
      • 2.Sd3#
      • 2.Sd7#
  • Tries
    • 1.Bf2+?
      • 1...Qd4
        • 2.Bxd4#
      • 1...Qe3!
    • 1.Bxc3?
      • threat
        • 2.Bd4#
        • 2.Qg1#
      • 1...Sxc3
        • 2.Qg1#
      • 1...Bc1
        • 2.Bb4#
        • 2.Bd4#
      • 1...Bb2
        • 2.Bb4#
        • 2.Qg1#
      • 1...Sg6
        • 2.Bd4#
      • 1...f3
        • 2.Bd4#
      • 1...b4!
    • 1.Bxb3?
      • threat
        • 2.Sd3#
        • 2.Sd7#
      • 1...Qxe5
        • 2.Bf2#
        • 2.Rxe5#
        • 2.Qxe5#
        • 2.Qg1#
      • 1...Qd3
        • 2.Sxd3#
        • 2.Sd7#
      • 1...Qxb3!
    • 1.Bd3?
      • threat
        • 2.Sd7#
      • 1...Qxe5
        • 2.Bf2#
        • 2.Qg1#
      • 1...Qxd3!
    • 1.Qg1+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qe3!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sd3#
      • 1...Kb4+
        • 2.Sec6#
      • 1...Kd4+
        • 2.Sec4#
      • 1...Qxa5
        • 2.Qg1#
      • 1...Qxe5
        • 2.Qg1#
      • 1...Qd3
        • 2.Sxd3#
        • 2.Sd7#
      • 1...Bd5
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::B(B),XQ(c)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • B(B);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);XB(B)::QAB(K)
        • S(h);::B(B)
        • P(e);::B(B)
      • Refutation
        • P(f);
    • Try
      • B(C);XB(b)
      • Threat
        • DUALS(2)
      • Refutation
        • Q(c);XB(C)
    • Try
      • B(C);
      • Threat
        • R(F)+S(E),DCHECK
      • Refutation
        • Q(c);XB(C)
    • Try
      • Q(K);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(K),XQ(c)
      • Refutation
        • Q(c);P_SPINQ(c)
  • Actual
    • S(H);
    • Threat
      • R(F)+S(E),DCHECK
    • Vars
      • K(g);CHECK,P_SPINB(b),P_SPINQ(c),S_FLIGHT::S(E)
      • K(g);CHECK,S_FLIGHT::QAB(K)+S(E)
      • Q(c);N_GUARD,P_PINP(G),XS(H)::QAB(K)
      • Q(c);N_GUARD,P_PINP(I),P_SPINQ(c),XS(E)::QAB(K)
      • B(b);::S(E)
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