MESON Chess Problem Database

Problem Display
PID: 243435 (3R4/5pp1/BQb5/n4pbN/2p1k1pp/1p6/1Bn1P3/5N1K w - - 0 1)

Bednar, Milan

Pravda, 1980

3R4/5pp1/BQb5/n4pbN/2p1k1pp/1p6/1Bn1P3/5N1K

#2

8 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Sxd2#
    • 1...Bf6
      • 2.Sd2#
    • 1...Be7
      • 2.Sd2#
    • 1...Sa1
      • 2.Qd4#
    • 1...Se1
      • 2.Qd4#
    • 1...Sa3
      • 2.Qd4#
    • 1...Se3
      • 2.Sd2#
      • 2.Qd4#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sb7
      • 2.Qxc6#
    • 1...h3
      • 2.Sfg3#
  • Tries
    • 1.Bxc4?
      • threat
        • 2.Bd3#
      • 1...Bxd8
        • 2.Sd2#
      • 1...Sxc4
        • 2.Qxc6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bb5
        • 2.Bd5#
      • 1...Se1
        • 2.Qd4#
      • 1...Sb4
        • 2.Qd4#
      • 1...Bd7!
    • 1.Rd4+?
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Ke5+!
    • 1.Qe3+?
      • 1...Sxe3
        • 2.Sd2#
      • 1...Bxe3!
    • 1.Qc5?
      • threat
        • 2.Qe5#
      • 1...Bf6
        • 2.Sd2#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...c3
        • 2.Bd3#
      • 1...f6
        • 2.Qe7#
      • 1...Bf4!
    • 1.Qb8?
      • threat
        • 2.Qe5#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Bf6
        • 2.Qf4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...c3
        • 2.Bd3#
      • 1...f6!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Bf6
        • 2.Qf4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...c3
        • 2.Bd3#
      • 1...f6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • B(i);N_GUARD::S(A),XB(i)
    • B(i);N_GUARD::S(A)
    • S(a);N_GUARD::QAR1(G)
    • S(a);N_GUARD::QAR1(G),XS(a)
    • S(g);N_GUARD::QAB(G),XB(j)
    • P(f);N_GUARD::S(A)
  • Tries
    • Try
      • B(F);XP(c)
      • Threat
        • B(F)
      • Vars
        • B(i);N_GUARD,XR(H)::S(A)
        • S(g);N_GUARD,XB(F)::QAB(G),XB(j)
        • S(a);N_GUARD::QAR1(G),XS(a)
        • B(j);N_GUARD::B(F)
        • S(a);N_GUARD::QAR1(G)
      • Refutation
        • B(j);
    • Try
      • R(H);CHECK
      • Vars
        • S(a);OGATE,XR(H)::QAR1(G),XS(a)
      • Refutation
        • K(d);CHECK,P-FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • S(a);SBLOCK,XQ(G)::S(A)
      • Refutation
        • B(i);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • B(i);N_GUARD::S(A)
        • B(j);N_GUARD::QAB1(G),XB(j)
        • P(c);OGATE::B(F)
        • P(k);S_CUTB(i)::QAR(G)
      • Refutation
        • B(i);
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • B(i);N_GUARD::QAR1(G),XB(i)
        • B(i);N_GUARD::QAR1(G)
        • S(a);N_GUARD::R1(H),XS(a)
        • P(c);OGATE::B(F)
      • Refutation
        • P(k);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • B(i);N_GUARD::QAR1(G),XB(i)
      • B(i);N_GUARD::QAR1(G)
      • S(a);N_GUARD::R1(H),XS(a)
      • P(c);OGATE::B(F)
      • P(k);S_CUTB(i)::QAR(G)
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