MESON Chess Problem Database

Problem Display
PID: 238818 (8/b1R2N2/rp1p3r/pk2qR2/pN1p2n1/P2P1B2/K1P3b1/4Q3 w - - 0 1)

Janevski, Zivko

Schach, 2012

8/b1R2N2/rp1p3r/pk2qR2/pN1p2n1/P2P1B2/K1P3b1/4Q3

#2

10 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qe8#
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Rh1
      • 2.Sxd6#
    • 1...Rh2
      • 2.Sxd6#
    • 1...Rh3
      • 2.Sxd6#
    • 1...Rh4
      • 2.Sxd6#
    • 1...Rh5
      • 2.Sxd6#
    • 1...Rh7
      • 2.Sxd6#
    • 1...Rh8
      • 2.Sxd6#
    • 1...Sf6
      • 2.Sxd6#
    • 1...axb4
      • 2.Qxb4#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qb1#
      • 1...Qxd5+
        • 2.Rxd5#
      • 1...Qxe1
        • 2.Sc3#
      • 1...Rh1!
    • 1.Sc6?
      • threat
        • 2.Sxd4#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Kc5
        • 2.Sxa7#
      • 1...d5!
    • 1.Bc6+?
      • 1...Kc5
        • 2.Sxa6#
      • 1...Bxc6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Sd5#
      • 1...Qd5+
        • 2.Sxd5#
        • 2.Rxd5#
      • 1...axb4
        • 2.Qxb4#
      • 1...d5
        • 2.Sxd5#
      • 1...Qc5
        • 2.Sc6#
      • 1...Rh1
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(g);OGATE::QAB(A)
    • Q(g);CHECK,OGATE::R(H),XQ(g)
    • R(k);N_GUARD::S(J),XP(j)
    • S(d);S_CUTR(k)::S(J),XP(j)
    • P(e);OGATE,XS(G)::QAR1(A),XP(e)
  • Tries
    • Try
      • S(G);N_PINQ(g)
      • Threat
        • QAR(A)
      • Vars
        • Q(g);CHECK,OGATE,P_SPINQ(g),XS(G)::R(H),XQ(g)
        • Q(g);XQ(A)::R(H)+S(G),DCHECK
      • Refutation
        • R(k);
    • Try
      • S(G);
      • Threat
        • S(G),XP(c)
      • Vars
        • Q(g);CHECK,OGATE::R(H),XQ(g)
        • K(f);P-FLIGHT::R(I)+S(G),XB(l)
      • Refutation
        • P(j);N_SPINQ(g)
    • Try
      • B(F);CHECK
      • Vars
        • K(f);P-FLIGHT::S(G),XR(h)
      • Refutation
        • B(a);XB(F)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(G)
    • Vars
      • P(e);OGATE,P_SPINP(e),XS(G)::QAR1(A),XP(e)
      • P(j);N_SPINQ(g)::QAR(A)+S(G),XP(j)
      • Q(g);::QAR(A)+S(G)
      • R(k);N_GUARD::S(J),XP(j)
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