MESON Chess Problem Database

Problem Display
PID: 189717 (8/2n2Qb1/2P2p2/5K2/R1N3N1/1p3k1p/3pp1pP/1r2q1n1 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Source?, 1912

8/2n2Qb1/2P2p2/5K2/R1N3N1/1p3k1p/3pp1pP/1r2q1n1

#2

7 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Sxd2#
    • 1...Qg3
      • 2.Sxd2#
    • 1...Qh4
      • 2.Sxd2#
    • 1...Qf1
      • 2.Sxd2#
    • 1...Sb5
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
    • 1...Sa8
      • 2.Qd5#
    • 1...Se8
      • 2.Qd5#
    • 1...b2
      • 2.Ra3#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qe3#
        • 2.Qe4#
      • 1...d1S
        • 2.Qe4#
      • 1...Qf2
        • 2.Sxd2#
        • 2.Qe4#
      • 1...Bh6
        • 2.Qe4#
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qe4#
      • 1...Sxe6!
    • 1.Qxf6?
      • threat
        • 2.Sce5#
      • 1...Qg3
        • 2.Sxd2#
      • 1...Bxf6!
    • 1.Qxc7?
      • threat
        • 2.Qf4#
      • 1...Qg3
        • 2.Sxd2#
        • 2.Qxg3#
      • 1...Bh6!
    • 1.Qe7?
      • threat
        • 2.Qe3#
        • 2.Qe4#
      • 1...d1S
        • 2.Qe4#
      • 1...Qf2
        • 2.Sxd2#
        • 2.Qe4#
      • 1...Bh6
        • 2.Qe4#
      • 1...Sd5
        • 2.Qe4#
      • 1...Se6!
  • Keys
    • 1.Kg6!
      • threat
        • 2.Sce5#
      • 1...Ke4
        • 2.Sce5#
      • 1...Kf4
        • 2.Sxd2#
        • 2.Sce5#
      • 1...Kxg4
        • 2.Sxd2#
        • 2.Se5#
      • 1...Qg3
        • 2.Sxd2#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::S(C),XP(d)
    • S(k);N_GUARD::QAB(G)
    • S(k);N_GUARD::QAB(G),XS(k)
    • P(g);OGATEB::R(B)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAB1(G)
        • B(l);::QAB1(G)
      • Refutation
        • S(k);XQ(G)
    • Try
      • Q(G);XP(j)
      • Threat
        • S(C)
      • Vars
        • Q(b);N_GUARD::S(C),XP(d)
      • Refutation
        • B(l);XQ(G)
    • Try
      • Q(G);XS(k)
      • Threat
        • QAR1(G)
      • Refutation
        • B(l);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAB1(G)
        • B(l);::QAB1(G)
        • S(k);::QAB1(G)
      • Refutation
        • S(k);
  • Actual
    • K(E);P_PINP(j),S_FLIGHT
    • Threat
      • S(C)
    • Vars
      • K(h);N_SPINP(j),S_FLIGHT::R(B)+S(C)
      • Q(b);N_GUARD,P_PINS(D)::S(C),XP(d)
      • P(j);OGATE::QAR2(G),XP(j)
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