MESON Chess Problem Database

Problem Display
PID: 238033 (1K4B1/Pn6/1P2Q1n1/bNk5/Pp5p/1r1R2N1/3P4/5brq w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Shakhmaty v SSSR, 1982

1K4B1/Pn6/1P2Q1n1/bNk5/Pp5p/1r1R2N1/3P4/5brq

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sxe4#
    • 1...Qc6
      • 2.Qe3#
    • 1...Qh3
      • 2.Se4#
    • 1...Rg2
      • 2.Se4#
    • 1...Bxb6
      • 2.Qc4#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qd6#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Qc4#
        • 2.Qe3#
      • 1...Qc6+
        • 2.Qxc6#
      • 1...Bxb6+
        • 2.Qxb6#
      • 1...Rxg3
        • 2.Qc4#
      • 1...Rxd3
        • 2.Qc4#
      • 1...Bxd3
        • 2.Qe3#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qf3
        • 2.Qc4#
      • 1...Qe4
        • 2.Sxe4#
      • 1...Rc3
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#
        • 2.Qxd6#
      • 1...Se5!
    • 1.Rc3+?
      • 1...Rxc3
        • 2.d4#
      • 1...Bc4
        • 2.Rxc4#
        • 2.d4#
      • 1...bxc3!
  • Keys
    • 1.Rd6!
      • threat
        • 2.d4#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qc6
        • 2.Rxc6#
      • 1...Qe4
        • 2.Sxe4#
      • 1...Rd3
        • 2.Qc4#
      • 1...Bd3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::S(C),XQ(c)
    • Q(c);SBLOCK::QAB(G)
    • Q(c);N_GUARD::S(C)
    • R(b);S_CUTQ(c)::S(C)
    • B(g);SBLOCK,XP(F)::QAR1(G)
    • S(j);N_GUARD::QAB1(G),XS(j)
    • S(j);N_GUARD::QAB1(G)
  • Tries
    • Try
      • K(I);P_SPINP(F),S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,N_GUARD::QAR1(G),XQ(c)
        • B(g);CHECK,OGATE,XP(F)::QAB1(G),XB(g)
        • R(b);XS(C)::QAR1(G)
        • R(d);XR(B)::QAR1(G)
        • B(a);XR(B)::QAB(G)
        • Q(c);N_GUARD::QAR1(G),XQ(c)
        • Q(c);::QAR1(G)
        • Q(c);N_GUARD::S(C),XQ(c)
        • R(d);::QAB(G)
      • Refutation
        • S(i);
    • Try
      • R(B);CHECK
      • Vars
        • R(d);XR(B)::P(A)
      • Refutation
        • P(e);XR(B)
  • Actual
    • R(B);
    • Threat
      • P(A)
    • Vars
      • S(j);OGATE,XR(B)::QAB1(G),XS(j)
      • Q(c);N_GUARD::QAR1(G),XQ(c)
      • Q(c);N_GUARD::R1(B),XQ(c)
      • Q(c);N_GUARD::S(C),XQ(c)
      • R(d);S_CUTB(a)::QAR1(G)
      • B(a);S_CUTR(d)::QAB(G)
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