MESON Chess Problem Database

Problem Display
PID: 121347 (b3r3/7p/5N1K/1RrPk3/5p2/2p2P1Q/2NP4/8 w - - 0 1)

Marik, Josef V

Bohemia, 1903

b3r3/7p/5N1K/1RrPk3/5p2/2p2P1Q/2NP4/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Qxe6#
    • 1...Rb8
      • 2.Qe6#
    • 1...Rc8
      • 2.Qe6#
    • 1...Rd8
      • 2.Qe6#
    • 1...Rf8
      • 2.Qe6#
    • 1...Rg8
      • 2.Qe6#
    • 1...Rh8
      • 2.Qe6#
  • Tries
    • 1.Sxe8?
      • threat
        • 2.Qe6#
        • 2.Qh5#
      • 1...Rc6+
        • 2.dxc6#
      • 1...Rxd5
        • 2.d4#
      • 1...Bxd5
        • 2.d4#
      • 1...Kxd5!
    • 1.d4+?
      • 1...Kd6
        • 2.Qd7#
      • 1...Kxf6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qh5#
      • 1...Rc6+
        • 2.dxc6#
      • 1...Re6+
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Rxc5#
      • 1...Rxd5
        • 2.d4#
      • 1...Bxd5
        • 2.d4#
      • 1...Rf8
        • 2.Qe6#
      • 1...Rg8
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(g);N_GUARD,P_PINS(G)::QAR1(D),XR(g)
    • R(g);N_GUARD::QAR1(D)
  • Tries
    • Try
      • S(G);XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);CHECK,OGATE::R(E)+P(F),XR(c)
        • R(c);P_SPINR(c),XP(F)::P(B)
        • B(f);SBLOCK,XP(F)::P(B)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(c),XP(F)
    • Try
      • P(B);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(D)
      • Refutation
        • K(d);S_FLIGHT,XS(G)
  • Actual
    • S(G);
    • Threat
      • QAR(D)
    • Vars
      • R(c);CHECK,OGATE::R(E)+P(F),XR(c)
      • R(g);CHECK,N_GUARD::QAR1(D),XR(g)
      • K(d);OGATEB,P-FLIGHT,P_SPINR(c),XP(F)::R1(E),XR(c)
      • R(c);P_SPINR(c),XP(F)::P(B)
      • B(f);SBLOCK,XP(F)::P(B)
      • R(g);N_GUARD::QAR1(D)
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