MESON Chess Problem Database

Problem Display
PID: 196301 (5K2/3RRB1p/p6B/1p2p3/1Qp1k1bN/8/qbP3n1/1N1r4 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Suomen Shakki, 1984

5K2/3RRB1p/p6B/1p2p3/1Qp1k1bN/8/qbP3n1/1N1r4

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Sd2#
    • 1...Re1
      • 2.Sd2#
    • 1...Rf1
      • 2.Sd2#
    • 1...Rg1
      • 2.Sd2#
    • 1...Rh1
      • 2.Sd2#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Rd3
      • 2.cxd3#
    • 1...Bc1
      • 2.Sc3#
    • 1...Ba3
      • 2.Sc3#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bd4
      • 2.Bd5#
  • Tries
    • 1.Bg6+?
      • 1...Bf5
        • 2.Bxf5#
      • 1...hxg6!
    • 1.Qc3?
      • threat
        • 2.Rxe5#
      • 1...Bxc3
        • 2.Sxc3#
      • 1...Rd4
        • 2.Rxd4#
      • 1...Rd5
        • 2.Bxd5#
      • 1...Ba3
        • 2.Qxe5#
      • 1...Be6
        • 2.Qf3#
      • 1...Qa3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Bd5#
      • 1...Rxd2
        • 2.Sxd2#
      • 1...Sxh4
        • 2.Qf4#
      • 1...Rf1
        • 2.Qd5#
      • 1...Be6
        • 2.Qxg2#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf4
        • 2.Qxf4#
      • 1...c3
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::S(A)
    • R(a);N_GUARD,P_PINB(H)::S(A)
    • R(a);N_GUARD::S(A),XR(a)
    • R(a);OGATE::P(B),XR(a)
    • B(c);N_GUARD::S(A)
    • B(c);N_GUARD::S(A),XB(c)
    • B(c);N_SPINP(e),P_SPINP(i),SBLOCK,S_CUTR(a)::B(H)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::B(H),XB(g)
      • Refutation
        • P(k);XB(H)
    • Try
      • Q(C);N_PINP(e),P_PINP(i)
      • Threat
        • R1(G),XP(i)
      • Vars
        • B(c);XQ(C)::S(A),XB(c)
        • R(a);N_GUARD::R1(F),XR(a)
        • R(a);N_GUARD::B(H),XR(a)
        • B(c);N_GUARD,P_PINR(G)::QAR1(C),XP(i)
        • B(g);N_GUARD,N_SPINP(i)::QAB1(C)
      • Refutation
        • Q(b);P_PINR(G)
  • Actual
    • Q(C);N_PINP(e),P_PINP(i)
    • Threat
      • B(H)
    • Vars
      • R(a);XQ(C)::S(A),XR(a)
      • S(d);N_GUARD,XS(D)::QAR1(C)
      • R(a);N_GUARD,P_PINB(H)::QAB1(C)
      • B(g);N_GUARD,N_SPINP(i)::QAB(C),XS(d)
      • S(d);N_GUARD::QAR1(C),XS(d)
      • P(e);S_CUTB(c)::R1(F)
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