MESON Chess Problem Database

Problem Display
PID: 93938 (K4RQ1/1Np4p/8/1B2p2p/3Pk3/8/1nn3bp/B2N2q1 w - - 0 1)

Pituk, Alexander

Sachove umeni (Ceskoslovensky sach), 1954

K4RQ1/1Np4p/8/1B2p2p/3Pk3/8/1nn3bp/B2N2q1

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qc4#
    • 1...Qxd4
      • 2.Qxg2#
    • 1...Sd3
      • 2.Bc6#
    • 1...Sc4
      • 2.Sc5#
    • 1...Sxd4
      • 2.Sc5#
    • 1...exd4
      • 2.Qe6#
  • Tries
    • 1.Bxb2?
      • threat
        • 2.Sc5#
      • 1...Qxd4
        • 2.Qxg2#
      • 1...exd4
        • 2.Qe6#
      • 1...c5
        • 2.Sxc5#
        • 2.Sd6#
      • 1...Qxd1!
    • 1.Qe6?
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Qc4#
      • 1...Sxd4
        • 2.Sc5#
      • 1...Sd3
        • 2.Bc6#
        • 2.Qc6#
      • 1...Sc4
        • 2.Sc5#
      • 1...Qxd4!
    • 1.Qxh7+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd5!
    • 1.Qxg2+?
      • 1...Kxd4
        • 2.Bxb2#
        • 2.Rd8#
      • 1...Qxg2!
    • 1.Qg4+?
      • 1...Kd5
        • 2.Sc3#
        • 2.Rd8#
      • 1...hxg4!
    • 1.Qg6+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd5
        • 2.Rd8#
      • 1...hxg6!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd5
        • 2.Qxe5#
      • 1...Qxd4
        • 2.Qxg2#
      • 1...Sxd4
        • 2.Sc3#
      • 1...exd4
        • 2.Bc6#
      • 1...Sd3
        • 2.Bc6#
      • 1...Sc4
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);OGATEB,P-FLIGHT,P_PINS(E),P_SPINS(b),XP(C)::QAR1(H)
    • Q(a);N_GUARD,SBLOCK,XP(C)::QAB(H),XB(d)
    • S(b);SBLOCK::B(D)
    • S(b);::S(E)
    • S(c);SBLOCK,XP(C)::S(E)
    • P(g);OGATEB,SBLOCK,XP(C)::QAR2(H)
  • Tries
    • Try
      • B(A);XS(b)
      • Threat
        • S(E)
      • Vars
        • Q(a);N_GUARD,XP(C)::QAB(H),XB(d)
        • P(g);OGATEB,XP(C)::QAR2(H)
      • Refutation
        • Q(a);XS(B)
    • Try
      • Q(H);P_PINP(g)
      • Threat
        • QAR1(H),XP(g)
      • Vars
        • K(f);N_SPINP(g),OGATEB,P-FLIGHT,P_PINS(E),P_SPINS(b),XP(C)::QAR1(H)
        • S(c);SBLOCK,XP(C)::S(E)
        • S(b);::S(E)
      • Refutation
        • Q(a);XP(C)
    • Try
      • Q(H);CHECK,XP(j)
      • Vars
        • K(f);OGATE,P-FLIGHT,P_PINS(E),P_SPINS(b),XP(C)::QAR1(H)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(H);CHECK,XB(d)
      • Refutation
        • Q(a);XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • P(h);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT,P_PINS(E),P_SPINS(b),XP(C)::QAR1(H)
        • K(f);S_FLIGHT::R(G)
      • Refutation
        • P(j);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XP(g)
    • Vars
      • K(f);P-FLIGHT,P_PINS(E),P_SPINS(b),XP(C)::QAR1(H)
      • K(f);S_FLIGHT::QAR1(H),XP(g)
      • Q(a);N_GUARD,SBLOCK,XP(C)::QAB(H),XB(d)
      • S(c);SBLOCK,XP(C)::S(B)
      • P(g);SBLOCK,XP(C)::B(D)
      • S(b);::B(D)
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