MESON Chess Problem Database

Problem Display
PID: 150970 (4b3/b1BN2p1/1Nn5/1KQp1r2/4kPB1/3RP3/2P2rn1/3R1q2 w - - 0 1)

Akobiya, Yuri

Sachove umeni (Ceskoslovensky sach), 1980

4b3/b1BN2p1/1Nn5/1KQp1r2/4kPB1/3RP3/2P2rn1/3R1q2

#2

11 + 10

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3+
      • 2.cxd3#
    • 1...Rxf4
      • 2.Qxd5#
    • 1...Rf6
      • 2.Qxd5#
    • 1...Rf7
      • 2.Qxd5#
    • 1...Rf8
      • 2.Qxd5#
    • 1...Sxe3
      • 2.Qxe3#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sd4+
      • 2.Qxd4#
    • 1...Sa5
      • 2.Qd4#
    • 1...Se5
      • 2.Qd4#
      • 2.Qxd5#
    • 1...Se7
      • 2.Qd4#
    • 1...Sb8
      • 2.Qd4#
    • 1...Sd8
      • 2.Qd4#
    • 1...d4
      • 2.Qxf5#
  • Tries
    • 1.Sf6+?
      • 1...Rxf6
        • 2.Qxd5#
      • 1...gxf6!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sd6#
      • 1...Sd4+
        • 2.Rxd4#
      • 1...Qxd3
        • 2.cxd3#
      • 1...Bxc5
        • 2.Sxc5#
      • 1...Sxe3
        • 2.Rxe3#
      • 1...dxc4
        • 2.Qxf5#
      • 1...Rf6
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(a);CHECK,OGATE,XR(C)::P(B),XQ(a)
    • R(f);N_GUARD,XP(E)::QAB1(H),XP(e)
    • R(f);N_GUARD::QAB1(H),XP(e)
    • S(c);OGATE,XP(D)::QAR1(H),XS(c)
    • S(g);N_GUARD,P_PINS(K)::QAR1(H)
    • S(g);CHECK,N_GUARD,P_PINS(K)::QAR1(H),XS(g)
    • P(e);OGATE,P_PINQ(H)::QAB1(H),XR(f)
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • R(f);XS(K)::QAB1(H),XP(e)
      • Refutation
        • P(i);XS(K)
  • Actual
    • S(I);N_SPINR(C)
    • Threat
      • S(I)
    • Vars
      • S(g);CHECK,N_GUARD,P_PINS(K)::R1(C),XS(g)
      • Q(a);OGATE,P_PINS(I),XR(C)::P(B),XQ(a)
      • B(h);XQ(H)::S(K),XB(h)
      • S(c);OGATE,XP(D)::R1(C),XS(c)
      • P(e);OGATE,P_PINQ(H),XS(I)::QAB1(H),XR(f)
      • R(f);N_GUARD::QAB1(H),XP(e)
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