MESON Chess Problem Database

Problem Display
PID: 276649 (1r3Q2/2b3p1/3NP1P1/2N1p3/1BPkB3/r1p1p1K1/3n4/3R4 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Best Problems, 2023

1r3Q2/2b3p1/3NP1P1/2N1p3/1BPkB3/r1p1p1K1/3n4/3R4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sb3#
    • 1...Ra2
      • 2.Sb3#
    • 1...Rb3
      • 2.Sxb3#
    • 1...Ra4
      • 2.Sb3#
    • 1...Ra5
      • 2.Sb3#
    • 1...Ra6
      • 2.Sb3#
    • 1...Ra7
      • 2.Sb3#
    • 1...Raa8
      • 2.Sb3#
    • 1...e2
      • 2.Qf2#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Sf5#
      • 1...Rxf8
        • 2.Sb5#
      • 1...e4
        • 2.Qxg7#
      • 1...Bxd6!
    • 1.Rxd2+?
      • 1...exd2
        • 2.Qf2#
      • 1...cxd2!
    • 1.Qf1?
      • threat
        • 2.Sf5#
        • 2.Qd3#
      • 1...Bxd6
        • 2.Qd3#
      • 1...e2
        • 2.Qg1#
        • 2.Qf2#
      • 1...Rf8
        • 2.Sb5#
        • 2.Qd3#
      • 1...c2
        • 2.Sf5#
      • 1...Rxb4!
    • 1.e7?
      • threat
        • 2.Se6#
      • 1...e2
        • 2.Qf2#
      • 1...Bxd6!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Sf5#
      • 1...Sf1+
        • 2.Bxf1#
      • 1...Se4+
        • 2.Bxe4#
      • 1...Rxf8
        • 2.Sb5#
      • 1...Bxd6
        • 2.Qxd6#
      • 1...Sxc4
        • 2.Bxc4#
      • 1...e4
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::S(F)
    • R(b);N_GUARD::S(F),XR(b)
    • P(d);OGATEB::QAB(J)
  • Tries
    • Try
      • B(E);
      • Threat
        • S(G)
      • Vars
        • R(i);N_GUARD,XQ(J)::S(G)
        • P(f);OGATEB,P_PINS(G)::QAB(J),XP(h)
      • Refutation
        • B(g);XS(G)
    • Try
      • R(A);CHECK,XS(a)
      • Vars
        • P(d);S_CUTP(c),XR(A)::QAB(J)
      • Refutation
        • P(c);XR(A)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XS(G)::QAR1(J)
        • P(c);::S(G)
      • Refutation
        • R(i);XB(C)
    • Try
      • P(H);
      • Threat
        • S(F)
      • Vars
        • P(d);OGATEB::QAB(J)
      • Refutation
        • B(g);XS(G)
  • Actual
    • B(E);N_PINS(a)
    • Threat
      • S(G)
    • Vars
      • S(a);CHECK,OGATEB::R(A)+B(E),XS(a)
      • R(i);N_GUARD,XQ(J)::S(G)
      • B(g);OGATE,XS(G)::QAR2(J),XB(g)
      • S(a);OGATE,XP(D)::R(A)+B(E),XS(a)
      • P(f);OGATEB,P_PINS(G)::QAB(J),XP(h)
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