MESON Chess Problem Database

Problem Display
PID: 182261 (1N3R1N/4k2r/4p2P/4P2n/3p4/2pP1Q2/2K1p1q1/4b3 w - - 0 1)

Izvolsky, Nikolai Aleksandrovich

1st Prize, Tidskrift for Schack, 1906

1N3R1N/4k2r/4p2P/4P2n/3p4/2pP1Q2/2K1p1q1/4b3

#2

8 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sg6#
    • 1...Qh1
      • 2.Sg6#
    • 1...Qxf3
      • 2.Sg6#
    • 1...Qh3
      • 2.Sg6#
    • 1...Qf2
      • 2.Sg6#
    • 1...Qh2
      • 2.Sg6#
    • 1...Qg6
      • 2.Sxg6#
    • 1...Rxh6
      • 2.Qf7#
    • 1...Rf7
      • 2.Qxf7#
    • 1...Rxh8
      • 2.Qf7#
    • 1...Bg3
      • 2.Sg6#
    • 1...Sg3
      • 2.Sg6#
      • 2.Qf6#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sg7
      • 2.Qf6#
      • 2.Qf7#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qd8#
      • 1...Kxf8
        • 2.Qd8#
      • 1...Qxd5
        • 2.Sg6#
      • 1...exd5!
    • 1.Qxh5?
      • threat
        • 2.Re8#
        • 2.Qe8#
      • 1...Rxh8
        • 2.Qf7#
        • 2.Qe8#
      • 1...Qc6
        • 2.Sg6#
      • 1...Qg6
        • 2.Sxg6#
      • 1...Qg8
        • 2.Qe8#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Kxf8!
    • 1.Qc6?
      • threat
        • 2.Re8#
        • 2.Qe8#
        • 2.Qc5#
        • 2.Qd6#
      • 1...Qxc6
        • 2.Sg6#
      • 1...Rxh8
        • 2.Qe8#
        • 2.Qc5#
        • 2.Qd6#
      • 1...Qd5
        • 2.Sg6#
        • 2.Re8#
        • 2.Qe8#
      • 1...Qg6
        • 2.Sxg6#
        • 2.Qc5#
        • 2.Qd6#
      • 1...Qg8
        • 2.Qe8#
        • 2.Qc5#
        • 2.Qd6#
      • 1...Sf6
        • 2.Qc5#
        • 2.Qd6#
      • 1...Sg7
        • 2.Qc5#
        • 2.Qd6#
      • 1...Kxf8!
    • 1.Qb7+?
      • 1...Qxb7
        • 2.Sg6#
      • 1...Kxf8!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qa3#
      • 1...Kxf8
        • 2.Sc6#
      • 1...Qxa8
        • 2.Sg6#
      • 1...Qd5
        • 2.Sg6#
      • 1...Qc6
        • 2.Sg6#
      • 1...Qb7
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 12
  • Sets
    • Q(c);N_GUARD::S(H)
    • Q(c);N_GUARD,XQ(C)::S(H)
    • Q(c);N_GUARD,P_PINP(B)::S(H),XQ(c)
    • R(i);N_GUARD,XP(E)::QAR1(C)
    • R(i);N_GUARD::QAR1(C),XR(i)
    • R(i);N_GUARD,XS(H)::QAR1(C)
    • B(a);S_CUTQ(c)::S(H)
    • S(f);N_GUARD::QAB1(C),XS(f)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • K(h);S_FLIGHT,XR(G)::QAR2(C)
        • Q(c);N_GUARD,XQ(C)::S(H)
      • Refutation
        • P(g);XQ(C)
    • Try
      • Q(C);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_GUARD::S(H)
        • Q(c);N_GUARD,P_PINP(B)::S(H),XQ(c)
        • Q(c);::QAR1(C)
        • R(i);N_GUARD::QAR1(C),XR(i)
      • Refutation
        • K(h);S_FLIGHT,XR(G)
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Vars
        • Q(c);N_GUARD,XQ(C)::S(H)
      • Refutation
        • K(h);S_FLIGHT,XR(G)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(c);XQ(C)::S(H)
      • Refutation
        • K(h);S_FLIGHT,XR(G)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • K(h);S_FLIGHT,XR(G)::QAR(C)+S(F)
      • Q(c);N_GUARD,XQ(C)::S(H)
      • Q(c);N_GUARD::S(H)
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