MESON Chess Problem Database

Problem Display
PID: 93933 (8/p5p1/P2Q2p1/p2P2pb/p2k2p1/P5P1/P3BN2/3K4 w - - 0 1)

Jancek, Jan

2/4 HM., Sachove umeni (Ceskoslovensky sach), 1956

8/p5p1/P2Q2p1/p2P2pb/p2k2p1/P5P1/P3BN2/3K4

#2

9 + 9

6490 yacpdb 2009
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qe5#
    • 1...Ke3
      • 2.Qc5#
  • Tries
    • 1.Kc1?
      • 1...Kc3
        • 2.Qc5#
        • 2.Qe5#
      • 1...Ke3!
    • 1.Ke1?
      • 1...Ke3
        • 2.Qc5#
        • 2.Qe5#
      • 1...Kc3!
    • 1.Sh1?
      • 1...Kc3
        • 2.Qe5#
      • 1...Ke3
        • 2.Qe5#
      • 1...Ke4!
    • 1.Sxg4?
      • 1...Kc3
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Bxg4!
    • 1.Bf1?
      • 1...Kc3
        • 2.Qe5#
      • 1...Ke3!
    • 1.Bd3?
      • 1...Kc3
        • 2.Qe5#
      • 1...Ke3!
    • 1.Bb5?
      • 1...Kc3
        • 2.Qe5#
      • 1...Ke3!
    • 1.Qc7?
      • 1...Ke3
        • 2.Qc5#
        • 2.Qxa7#
      • 1...Kxd5!
    • 1.Qe7?
      • 1...Kc3
        • 2.Qe5#
        • 2.Qxg7#
      • 1...Kxd5!
    • 1.Qc6?
      • 1...Ke3
        • 2.Qc5#
      • 1...Ke5!
    • 1.Qe6?
      • 1...Kc3
        • 2.Qe5#
      • 1...Kc5!
  • Keys
    • 1.Sd3!
      • 1...Kc3
        • 2.Qc5#
      • 1...Ke3
        • 2.Qe5#
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qe5#

Anticipated by 16715(1942)

This anticipates 92295(1958), 9835(1960), 219864(1979)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(I)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(b);S_FLIGHT::QAB(I)
        • K(b);S_FLIGHT::QAR2(I)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);XP(c)
      • Vars
        • K(b);S_FLIGHT::QAB(I)
        • K(b);P-FLIGHT::QAR1(I)
      • Refutation
        • B(f);P_PINB(C),XS(D)
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT::QAB(I)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT::QAB(I)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT::QAB(I)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(I);
      • Refutation
        • K(b);P-FLIGHT,XP(G)
    • Try
      • Q(I);
      • Refutation
        • K(b);P-FLIGHT,XP(G)
    • Try
      • Q(I);
      • Vars
        • K(b);S_FLIGHT::QAB(I)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(I);
      • Vars
        • K(b);S_FLIGHT::QAB(I)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(b);S_FLIGHT::QAR2(I)
      • K(b);P-FLIGHT::QAR1(I)
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