MESON Chess Problem Database

Problem Display
PID: 207082 (3Rb2r/6N1/1K1p3r/R1pkB3/ppp1NPp1/6pq/1nQ5/6bn w - - 0 1)

Litvinov, Viktor

Il Problema, 1961

3Rb2r/6N1/1K1p3r/R1pkB3/ppp1NPp1/6pq/1nQ5/6bn

#2

8 + 15

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Sf6#
      • 2.Rxd6#
    • 1...Rh5
      • 2.Sf6#
      • 2.Rxd6#
    • 1...Rf6
      • 2.Sxf6#
    • 1...R6h7
      • 2.Sf6#
      • 2.Rxd6#
    • 1...Bh2
      • 2.Rxc5#
    • 1...Bg6
      • 2.Sf6#
      • 2.Rxd6#
    • 1...Sf2
      • 2.Rxc5#
    • 1...b3
      • 2.Sc3#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qe4#
      • 1...Bg6
        • 2.Rxd6#
      • 1...Sf2
        • 2.Rxc5#
      • 1...Sd3
        • 2.Qxc4#
      • 1...Qg2!
    • 1.Sxc5?
      • threat
        • 2.Qe4#
      • 1...Bxc5+
        • 2.Rxc5#
      • 1...Qg2
        • 2.Qxg2#
      • 1...Bg6
        • 2.Rxd6#
      • 1...Sf2
        • 2.Sd7#
      • 1...Sd3!
    • 1.Sg5?
      • threat
        • 2.Qe4#
      • 1...Qg2
        • 2.Qxg2#
      • 1...Bg6
        • 2.Rxd6#
      • 1...Sf2
        • 2.Rxc5#
      • 1...Sd3!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Qe4#
      • 1...Rxd6+
        • 2.Rxd6#
      • 1...Sd3
        • 2.Qxc4#
      • 1...Qg2
        • 2.Qxg2#
      • 1...Bg6
        • 2.Sde8#
      • 1...Sf2
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(m);N_GUARD::S(B),XR(m)
    • B(a);N_GUARD::R1(D),XP(j)
    • S(b);S_CUTB(a)::R1(D),XP(j)
    • P(g);N_GUARD::S(B)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • B(n);S_CUTR(m)::R1(H),XP(l)
        • S(b);S_CUTB(a)::R1(D),XP(j)
        • S(c);N_GUARD::QAB1(A),XP(h)
      • Refutation
        • Q(e);
    • Try
      • S(B);P_PINP(l),P_SPINS(B),XP(j)
      • Threat
        • QAB1(A)
      • Vars
        • B(a);CHECK,OGATE,P_SPINB(a),XS(B)::R1(D),XB(a)
        • Q(e);N_GUARD::QAB(A),XQ(e)
        • B(n);S_CUTR(m)::R1(H),XP(l)
        • S(b);N_PINS(B)::R(D)+S(B)
      • Refutation
        • S(c);
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • Q(e);N_GUARD::QAB(A),XQ(e)
        • B(n);S_CUTR(m)::R1(H),XP(l)
        • S(b);S_CUTB(a)::R1(D),XP(j)
      • Refutation
        • S(c);
  • Actual
    • S(B);P_SPINS(B),XP(l)
    • Threat
      • QAB1(A)
    • Vars
      • R(m);CHECK,OGATE,P_SPINR(m),XS(B)::R1(H),XR(m)
      • S(c);N_GUARD::QAB1(A),XP(h)
      • Q(e);N_GUARD::QAB(A),XQ(e)
      • B(n);N_PINS(B)::R(H)+S(B)
      • S(b);S_CUTB(a)::R1(D),XP(j)
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