MESON Chess Problem Database

Problem Display
PID: 157314 (4n3/2n5/1R2p3/2pkP1p1/2p4b/2B5/8/RQ3K2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Match: Kharkov - Leningrad, 1976

4n3/2n5/1R2p3/2pkP1p1/2p4b/2B5/8/RQ3K2

#2

6 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Rxd6#
    • 1...Sf6
      • 2.Rd6#
    • 1...Sg7
      • 2.Rd6#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Qh1#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sf6
        • 2.Rd6#
      • 1...Be1!
    • 1.Rba6?
      • threat
        • 2.Qb7#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sb5!
    • 1.Qc2?
      • threat
        • 2.Rd1#
        • 2.Qg2#
      • 1...Be1
        • 2.Qg2#
      • 1...Sb5
        • 2.Qg2#
      • 1...Sd6
        • 2.Rd1#
        • 2.Rxd6#
      • 1...Sf6
        • 2.Rd1#
        • 2.Rd6#
      • 1...Bf2!
    • 1.Qf5?
      • threat
        • 2.Rd1#
        • 2.Qf3#
      • 1...Be1
        • 2.Qf3#
      • 1...Bf2
        • 2.Qf3#
      • 1...Sb5
        • 2.Qf3#
      • 1...Sd6
        • 2.Rd1#
        • 2.Rxd6#
      • 1...Sf6
        • 2.Rd1#
        • 2.Rd6#
      • 1...g4
        • 2.Rd1#
      • 1...exf5!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Rd1#
      • 1...Be1
        • 2.Qh1#
      • 1...Bf2
        • 2.Qh1#
      • 1...Sb5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(h);N_GUARD::R1(F),XS(h)
    • S(h);N_GUARD::R1(F)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAB(B)
      • Vars
        • S(h);N_GUARD::R1(F),XS(h)
        • S(h);N_GUARD::R1(F)
      • Refutation
        • B(b);
    • Try
      • R(F);
      • Threat
        • QAB(B)
      • Vars
        • S(h);N_GUARD::R1(F),XS(h)
      • Refutation
        • S(g);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAB(B)
        • S(g);::QAB(B)
      • Refutation
        • B(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAB(B)
        • S(g);::QAB(B)
        • P(e);::R(A)
      • Refutation
        • P(f);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • R(A)
    • Vars
      • B(b);OGATE::QAB(B)
      • S(g);OGATE::QAB(B)
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