MESON Chess Problem Database

Problem Display
PID: 253134 (7b/1pNr3p/1B4B1/n1n5/1ppkp3/1p5R/1N5Q/4K3 w - - 0 1)

Sushkov, Yuri Akimovich

4th Prize, Schach, 1978

7b/1pNr3p/1B4B1/n1n5/1ppkp3/1p5R/1N5Q/4K3

#2

7 + 11

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sb5#
      • 2.Se6#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Rxc7
      • 2.Qd6#
    • 1...Re7
      • 2.Qd6#
    • 1...Rf7
      • 2.Qd6#
    • 1...Rg7
      • 2.Qd6#
    • 1...Be5
      • 2.Qd2#
  • Tries
    • 1.Sa4?
      • threat
        • 2.Bxc5#
      • 1...Rxc7
        • 2.Qd6#
      • 1...Rd5
        • 2.Sb5#
        • 2.Se6#
      • 1...c3!
    • 1.Bf7?
      • threat
        • 2.Sb5#
      • 1...Rxc7
        • 2.Qd6#
      • 1...Rxf7
        • 2.Qd6#
      • 1...e3!
    • 1.Qg1+?
      • 1...e3
        • 2.Qxe3#
      • 1...Ke5!
    • 1.Qf4?
      • threat
        • 2.Qxe4#
      • 1...Re7
        • 2.Qd6#
      • 1...hxg6!
    • 1.Qf2+?
      • 1...e3
        • 2.Qxe3#
      • 1...Ke5!
  • Keys
    • 1.Rh5!
      • threat
        • 2.Qd2#
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke3
        • 2.Qf2#
      • 1...c3
        • 2.Bxc5#
      • 1...e3
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(i);N_GUARD::QAR2(C),XR(i)
    • R(i);N_GUARD,XS(G)::QAR2(C)
    • R(i);N_GUARD::QAR2(C)
    • B(k);SBLOCK::QAR2(C)
  • Tries
    • Try
      • S(B);
      • Threat
        • B(E),XS(g)
      • Vars
        • R(i);N_GUARD,XS(G)::QAR2(C)
      • Refutation
        • P(c);
    • Try
      • B(F);
      • Threat
        • S(G)
      • Vars
        • R(i);N_GUARD,XS(G)::QAR2(C)
        • R(i);N_GUARD,XB(F)::QAR2(C)
      • Refutation
        • P(e);
    • Try
      • Q(C);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAB1(C),XP(e)
      • Refutation
        • K(d);N_SPINS(g),S_FLIGHT
    • Try
      • Q(C);P_PINP(e)
      • Threat
        • QAR1(C),XP(e)
      • Vars
        • R(i);N_GUARD::QAR2(C)
      • Refutation
        • P(j);XB(F)
    • Try
      • Q(C);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAB1(C),XP(e)
      • Refutation
        • K(d);N_SPINS(g),S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • QAR2(C)
    • Vars
      • K(d);N_GUARD,N_SPINS(g),S_FLIGHT::S(G)
      • K(d);N_GUARD,S_CUTP(e),S_FLIGHT::QAB1(C)
      • P(c);SBLOCK::B(E),XS(g)
      • P(e);SBLOCK::S(G)
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