MESON Chess Problem Database

Problem Display
PID: 118236 (Rb1Nk2r/3p2r1/n4Q1N/B3pnp1/3PR3/7p/7K/8 w - - 0 1)

Pypa, Volodimir Iosifovich

Naika v Syspilstvo, 1967

Rb1Nk2r/3p2r1/n4Q1N/B3pnp1/3PR3/7p/7K/8

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6
      • 2.Qf7#
    • 1...Re7
      • 2.Qxh8#
    • 1...Rf7
      • 2.Qxf7#
    • 1...Rgg8
      • 2.Qf7#
  • Tries
    • 1.Sb7?
      • threat
        • 2.Qd8#
      • 1...Sxh6
        • 2.Sd6#
      • 1...Re7
        • 2.Qxh8#
      • 1...Se7
        • 2.Sd6#
      • 1...Rxh6!
    • 1.Sdf7?
      • threat
        • 2.Qd8#
      • 1...Kf8
        • 2.Qd8#
      • 1...Sxh6
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...Rxh6!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qd8#
      • 1...exd4+
        • 2.Sc7#
      • 1...Rxh6
        • 2.Qf8#
      • 1...Sxh6
        • 2.Sxg7#
      • 1...Re7
        • 2.Qxh8#
      • 1...Se7
        • 2.Sxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD::QAB1(E)
    • R(g);N_SPINP(b),OGATE,SBLOCK::QAR(E),XR(j)
    • R(g);N_GUARD::QAB1(E),XR(g)
  • Tries
    • Try
      • S(H);P_PINB(h)
      • Threat
        • QAR1(E)
      • Vars
        • S(c);N_GUARD,XS(F)::S(H)
        • R(g);N_SPINP(b),OGATE,SBLOCK::QAR(E),XR(j)
        • S(c);N_GUARD,N_SPINP(b)::S(H)
      • Refutation
        • R(j);XS(F)
    • Try
      • S(H);P_PINB(h)
      • Threat
        • QAR1(E)
      • Vars
        • K(i);N_SPINP(b),P-FLIGHT::QAR2(E)
        • S(c);N_GUARD,XS(F)::S(H)
        • S(c);N_GUARD,N_SPINP(b)::S(H)
      • Refutation
        • R(j);XS(F)
  • Actual
    • S(H);N_PINP(b),P_PINB(h)
    • Threat
      • QAR1(E)
    • Vars
      • P(b);CHECK,XP(B)::R(C)+S(H),DCHECK
      • R(j);N_GUARD,XS(F)::QAR1(E)
      • S(c);N_GUARD,XS(F)::S(H),XR(g)
      • R(g);OGATE,SBLOCK::QAR(E),XR(j)
      • S(c);N_GUARD::S(H),XR(g)
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