MESON Chess Problem Database

Problem Display
PID: 107061 (1n6/8/1p2pNK1/1Bp1k1pp/3R4/4b3/1Q6/8 w - - 0 1)

Herskovic, Ludwik

Prager Abendblatt, 1930

1n6/8/1p2pNK1/1Bp1k1pp/3R4/4b3/1Q6/8

#2

5 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Qh2#
    • 1...Bf4
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd5#
      • 2.Rd7#
      • 2.Rd8#
    • 1...Sa6
      • 2.Sd7#
    • 1...Sc6
      • 2.Sd7#
    • 1...Sd7
      • 2.Sxd7#
    • 1...h4
      • 2.Sg4#
  • Tries
    • 1.Rd1+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kf4!
    • 1.Rd3+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kf4!
    • 1.Ra4+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kd6!
    • 1.Rb4+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kd6!
    • 1.Rc4+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kd6!
    • 1.Rg4+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kd6!
    • 1.Rh4+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kd6!
    • 1.Rd7+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kf4!
    • 1.Rd8+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Kf4!
    • 1.Qe2?
      • threat
        • 2.Qxe3#
      • 1...Kxd4
        • 2.Qb2#
      • 1...cxd4!
    • 1.Qg2?
      • threat
        • 2.Qe4#
      • 1...Kxd4
        • 2.Qb2#
      • 1...Bxd4
        • 2.Qh2#
        • 2.Qg3#
      • 1...cxd4!
    • 1.Qh2+?
      • 1...Kxd4
        • 2.Qb2#
      • 1...Bf4!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qe4#
      • 1...Kxd4
        • 2.Qb2#
      • 1...Bxd4
        • 2.Qh2#
      • 1...cxd4
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD,P_SPINB(a),SBLOCK,XR(B)::QAB(A)
    • S(h);N_GUARD::S(D)
    • S(h);N_GUARD::S(D),XS(h)
    • P(e);N_GUARD::S(D)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);P_PINB(a)
      • Threat
        • QAR2(A),XB(a)
      • Vars
        • K(c);N_SPINB(a),OGATEB,S_FLIGHT,XR(B)::QAB(A)
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XR(B)::QAB(A)
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATEB,S_FLIGHT,XR(B)::QAB(A)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(B)::QAB(A)
      • B(a);N_GUARD,SBLOCK,XR(B)::QAB(A)
      • P(b);OGATE,SBLOCK,XR(B)::QAB(A)
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