MESON Chess Problem Database

Problem Display
PID: 120119 (3r4/8/1rpp1Q2/4P1Rb/N2k4/p2P4/3B3K/8 w - - 0 1)

Drnek, Josef

Nove parizske mody, 1907

3r4/8/1rpp1Q2/4P1Rb/N2k4/p2P4/3B3K/8

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.exd6#
      • 2.e6#
    • 1...Ra8
      • 2.Qxd6#
    • 1...Rb8
      • 2.Qxd6#
    • 1...Rc8
      • 2.Qxd6#
    • 1...Re8
      • 2.Qxd6#
    • 1...Rf8
      • 2.Qxd6#
    • 1...Rg8
      • 2.Qxd6#
    • 1...Rh8
      • 2.Qxd6#
    • 1...dxe5
      • 2.Qxd8#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Bc3#
        • 2.Qe4#
      • 1...Rb2
        • 2.Qe4#
      • 1...Rb3
        • 2.Qe4#
      • 1...Bg6
        • 2.Bc3#
      • 1...d5
        • 2.Bc3#
        • 2.Qe3#
      • 1...Bxf3!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kxd3!
  • Keys
    • 1.Sc5!
      • threat
        • 2.exd6#
        • 2.e6#
      • 1...Kxc5
        • 2.exd6#
      • 1...Kd5
        • 2.exd6#
        • 2.e6#
      • 1...dxc5
        • 2.Qxd8#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Re8
        • 2.Qxd6#
        • 2.e6#
      • 1...Rf8
        • 2.Qxd6#
      • 1...d5
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(g);N_GUARD::QAR2(G),XP(f)
    • P(f);OGATEB,P_SPINP(f),XP(E)::QAR(G),XR(g)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);P_PINB(A)::QAR1(G)
        • R(d);::QAR1(G)
        • B(c);::B(A)
      • Refutation
        • B(c);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(G)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT,XS(D)::R(F)+P(E),XP(f)
      • P(f);OGATEB,SBLOCK,XS(D)::QAR(G),XR(g)
      • P(f);OGATE,P_SPINP(f),XP(E)::QAB1(G),XP(f)
      • R(g);N_GUARD::QAR2(G),XP(f)
      • P(f);SBLOCK::QAB(G)
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