MESON Chess Problem Database

Problem Display
PID: 171243 (nK2Nn1q/1p1b2Pp/5QpB/6Pk/5R1N/1r6/r7/7R w - - 0 1)

Archakov, Vladimir Mikhailovich

Rychkov, Vladimir Nikolaevich

Turoverov, Valentin Alekseevich

Schach, 1975

nK2Nn1q/1p1b2Pp/5QpB/6Pk/5R1N/1r6/r7/7R

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg7
      • 2.Sxg7#
  • Tries
    • 1.Sg2+?
      • 1...Bh3
        • 2.Rh4#
      • 1...Rh3!
    • 1.Sf3+?
      • 1...Bh3
        • 2.Rxh3#
        • 2.Rh4#
      • 1...Rh2!
    • 1.Sf5+?
      • 1...Rh3
        • 2.Sg3#
        • 2.Rxh3#
      • 1...Rh2!
    • 1.Qb2?
      • threat
        • 2.Sf6#
      • 1...Qxg7
        • 2.Sxg7#
      • 1...Bxe8
        • 2.Sf3#
      • 1...Rb6
        • 2.Sf5#
      • 1...Se6
        • 2.Sf3#
      • 1...Ra6!
    • 1.Qc3?
      • threat
        • 2.Sf6#
      • 1...Qxg7
        • 2.Sxg7#
      • 1...Bxe8
        • 2.Sg2#
      • 1...Ra6
        • 2.Sf5#
      • 1...Se6
        • 2.Sg2#
      • 1...Rb6!
    • 1.Qe6?
      • threat
        • 2.Sf6#
      • 1...Qxg7
        • 2.Sxg7#
      • 1...Bxe8
        • 2.Qg4#
      • 1...Sxe6!
    • 1.Qxg6+?
      • 1...hxg6
        • 2.Sf6#
      • 1...Sxg6!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Sf6#
      • 1...Qxg7
        • 2.Sxg7#
      • 1...Bxe8
        • 2.Qg4#
      • 1...Ra6
        • 2.Sf3#
      • 1...Rb6
        • 2.Sg2#
      • 1...Se6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(j);XP(G)::S(I),XQ(j)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • B(f);P_SPINB(f)::R1(B)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • S(C);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • S(C);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(E);
      • Threat
        • S(I)
      • Vars
        • Q(j);XP(G)::S(I),XQ(j)
        • B(f);N_GUARD,XS(I)::R(A)+S(C)
        • R(b);N_GUARD::R(A)+S(C)
        • S(i);P_PINS(I),S_CUTB(f)::R(A)+S(C)
      • Refutation
        • R(a);
    • Try
      • Q(E);
      • Threat
        • S(I)
      • Vars
        • Q(j);XP(G)::S(I),XQ(j)
        • B(f);N_GUARD,XS(I)::R(A)+S(C)
        • R(a);N_GUARD,SBLOCK::R(A)+S(C)
        • S(i);P_PINS(I),S_CUTB(f)::R(A)+S(C)
      • Refutation
        • R(b);
    • Try
      • Q(E);
      • Threat
        • S(I)
      • Vars
        • Q(j);XP(G)::S(I),XQ(j)
        • B(f);N_GUARD,XS(I)::QAB1(E)
      • Refutation
        • S(i);P_PINS(I),XQ(E)
    • Try
      • Q(E);CHECK,XP(d)
      • Vars
        • P(g);XQ(E)::S(I)
      • Refutation
        • S(i);P_PINS(I),XQ(E)
  • Actual
    • Q(E);
    • Threat
      • S(I)
    • Vars
      • Q(j);XP(G)::S(I),XQ(j)
      • B(f);N_GUARD,XS(I)::QAB1(E)
      • R(a);N_GUARD,SBLOCK::R(A)+S(C)
      • R(b);N_GUARD::R(A)+S(C)
      • S(i);P_PINS(I),S_CUTB(f)::QAB1(E)
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