MESON Chess Problem Database

Problem Display
PID: 81402 (q3nBB1/p1P4K/R3PpN1/2Nk2rp/2p1RPP1/3b4/4rP2/1Q6 w - - 0 1)

Mosiashvili, Givi

Die Schwalbe, 2008

q3nBB1/p1P4K/R3PpN1/2Nk2rp/2p1RPP1/3b4/4rP2/1Q6

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qxb7#
    • 1...Qd8
      • 2.Qb7#
    • 1...c3
      • 2.Qxd3#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Se7#
        • 2.e7#
      • 1...Rxe4
        • 2.Sb3#
      • 1...Bxe4
        • 2.Sb3#
      • 1...Sxc7
        • 2.Se7#
        • 2.Rd6#
        • 2.Qd7#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qc8
        • 2.Se7#
        • 2.Qc6#
      • 1...Qd8
        • 2.Qc6#
        • 2.Qb7#
        • 2.e7#
      • 1...Re5
        • 2.Se7#
      • 1...Sd6
        • 2.Se7#
        • 2.Rxd6#
      • 1...Sg7
        • 2.Se7#
        • 2.Rd6#
        • 2.Qd7#
      • 1...Rxg6!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Rd4#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Rxe4
        • 2.Se7#
      • 1...Bxe4
        • 2.e7#
      • 1...cxb3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(i);N_GUARD,P_PINP(J)::QAB(A),XQ(i)
    • Q(i);N_GUARD::QAB(A)
    • P(c);N_GUARD::QAR2(A),XB(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);SBLOCK,XR(C)::QAR(A)+S(F)
        • B(b);P_PINS(I),SBLOCK,XR(C)::QAR(A)+S(F)
        • Q(i);N_GUARD::QAB1(A),XQ(i)
        • R(e);::S(I)
      • Refutation
        • R(e);XS(I)
  • Actual
    • S(F);
    • Threat
      • R1(C)
    • Vars
      • K(d);OGATEB,P_SPINB(b),S_FLIGHT,XR(C)::QAB(A)
      • R(a);SBLOCK,XR(C)::S(I)
      • B(b);P_PINS(I),XR(C)::B(M)+P(H)
      • P(c);N_GUARD,XS(F)::QAR2(A),XB(b)
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