MESON Chess Problem Database

Problem Display
PID: 120978 (8/8/2Rp1p1Q/K1Pp4/N1Pkp3/N6b/1pppP2B/1rq5 w - - 0 1)

Banny, Dimitry Nikolaevich

2nd Prize, Shakhmaty, 1974

8/8/2Rp1p1Q/K1Pp4/N1Pkp3/N6b/1pppP2B/1rq5

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qxd2#
    • 1...Qg1
      • 2.Qxd2#
    • 1...Qh1
      • 2.Qxd2#
    • 1...e3
      • 2.Qf4#
    • 1...dxc4
      • 2.Rxd6#
  • Tries
    • 1.Kb4?
      • threat
        • 2.Sb5#
      • 1...dxc4
        • 2.Rxd6#
      • 1...e3
        • 2.Qf4#
      • 1...dxc5+!
    • 1.Bf4?
      • threat
        • 2.Qxf6#
      • 1...dxc4
        • 2.Rxd6#
      • 1...f5
        • 2.Qg7#
        • 2.Qf6#
        • 2.Qh8#
      • 1...e3!
    • 1.Rxd6?
      • threat
        • 2.Rxd5#
      • 1...e3
        • 2.Qf4#
      • 1...Be6!
    • 1.Qxh3?
      • threat
        • 2.Qc3#
      • 1...dxc4
        • 2.Rxd6#
      • 1...e3
        • 2.Qg4#
        • 2.Qh4#
      • 1...d1S!
    • 1.cxd6?
      • threat
        • 2.Sb5#
      • 1...e3
        • 2.Qf4#
      • 1...dxc4!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Scb5#
      • 1...Kxc3
        • 2.Qe3#
      • 1...dxc4
        • 2.Sab5#
      • 1...e3
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_GUARD::QAR2(I),XP(e)
    • P(h);OGATEB::QAR2(I)
    • P(i);OGATEB,XP(E)::R(H),XP(j)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • S(C)
      • Vars
        • P(i);OGATEB,XP(E)::R(H),XP(j)
        • P(h);OGATEB::QAR2(I)
      • Refutation
        • P(j);CHECK,XP(G)
    • Try
      • B(B);
      • Threat
        • QAB(I),XP(k)
      • Vars
        • P(i);OGATEB,XP(E)::R(H),XP(j)
      • Refutation
        • P(h);
    • Try
      • R(H);P_PINP(i),XP(j)
      • Threat
        • R1(H),XP(i)
      • Vars
        • P(h);OGATEB::QAR2(I)
      • Refutation
        • B(f);
    • Try
      • Q(I);XB(f)
      • Threat
        • QAB1(I)
      • Vars
        • P(i);OGATEB,XP(E)::R(H),XP(j)
      • Refutation
        • P(e);
    • Try
      • P(G);XP(j)
      • Threat
        • S(C)
      • Vars
        • P(h);OGATEB::QAR2(I)
      • Refutation
        • P(i);XP(E)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(g);S_FLIGHT,XS(D)::QAR2(I)
      • P(i);SBLOCK,XP(E)::S(C)
      • P(h);SBLOCK::QAB(I),XP(k)
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