MESON Chess Problem Database

Problem Display
PID: 205070 (r3rBB1/1Qn1p1b1/6N1/2p5/1p1kp3/n5Rb/1K2pP2/2R1N3 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Zadachi i Etyudi, 1998

r3rBB1/1Qn1p1b1/6N1/2p5/1p1kp3/n5Rb/1K2pP2/2R1N3

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Bxg7#
    • 1...Sb1
      • 2.Sc2#
      • 2.Rc4#
    • 1...Sc2
      • 2.Sxc2#
    • 1...Sc4+
      • 2.Rxc4#
    • 1...Sab5
      • 2.Sc2#
      • 2.Rc4#
    • 1...Scb5
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
    • 1...Se6
      • 2.Qd7#
    • 1...e3
      • 2.fxe3#
    • 1...c4
      • 2.Qb6#
    • 1...e5
      • 2.Bxc5#
    • 1...e6
      • 2.Bxc5#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Rd2#
      • 1...Sc4+
        • 2.Rxc4#
      • 1...Sxc2
        • 2.Sxc2#
      • 1...c4
        • 2.Qb6#
      • 1...Be6
        • 2.Bxg7#
      • 1...Sb1
        • 2.Rc4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se6
        • 2.Qd7#
      • 1...e3
        • 2.fxe3#
      • 1...e6
        • 2.Bxc5#
      • 1...Bh6!
    • 1.Rxa3?
      • threat
        • 2.Sc2#
        • 2.Rc4#
      • 1...Rxa3
        • 2.Rc4#
      • 1...c4
        • 2.Rxc4#
        • 2.Qb6#
      • 1...Be6
        • 2.Bxg7#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se6
        • 2.Qd7#
      • 1...b3
        • 2.Rc4#
      • 1...e6
        • 2.Bxc5#
      • 1...bxa3+!
    • 1.Qc6?
      • threat
        • 2.Qxc5#
      • 1...Sc4+
        • 2.Rxc4#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sa6
        • 2.Qd5#
      • 1...Se6
        • 2.Qd7#
      • 1...e3
        • 2.fxe3#
      • 1...c4
        • 2.Qb6#
      • 1...Ra5!
    • 1.Qxb4+?
      • 1...Sc4+
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...c4
        • 2.Qb6#
      • 1...cxb4!
  • Keys
    • 1.Rd3+!
      • 1...exd3
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • B(c);S_CUTP(i)::B(H),XB(j)
    • S(b);N_GUARD::S(B),XS(b)
    • S(b);CHECK,N_GUARD::R1(A),XS(b)
    • S(h);N_GUARD::QAR1(G)
    • S(h);N_GUARD::QAR1(G),XS(h)
    • S(h);OGATE::QAR(G)
    • P(f);OGATE::P(D),XP(f)
    • P(g);OGATEB::QAB(G)
    • P(i);OGATE::B(H),XP(g)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • S(b);CHECK,N_GUARD::R1(A),XS(b)
        • S(b);XR(A)::S(B),XS(b)
        • P(g);OGATEB::QAB(G)
        • B(c);S_CUTP(i)::B(H),XB(j)
        • S(b);N_GUARD::R1(A)
        • S(h);N_GUARD::QAR1(G),XS(h)
        • S(h);OGATE::QAR(G)
        • P(f);OGATE::P(D),XP(f)
        • P(i);OGATE::B(H),XP(g)
      • Refutation
        • B(j);
    • Try
      • R(E);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(k);XR(E)::R1(A)
        • B(c);S_CUTP(i)::B(H),XB(j)
        • S(h);N_GUARD::QAR1(G),XS(h)
        • S(h);OGATE::QAR(G)
        • P(d);::R1(A)
        • P(i);OGATE::B(H),XP(g)
      • Refutation
        • P(d);CHECK,XR(E)
    • Try
      • Q(G);
      • Threat
        • QAB1(G),XP(g)
      • Vars
        • S(b);CHECK,N_GUARD::R1(A),XS(b)
        • S(b);N_GUARD::S(B),XS(b)
        • S(h);N_GUARD::QAR1(G)
        • S(h);N_GUARD,S_CUTB(c)::QAR(G)
        • P(f);OGATE::P(D),XP(f)
        • P(g);OGATEB::QAB(G)
      • Refutation
        • R(k);
    • Try
      • Q(G);CHECK,XP(d)
      • Vars
        • P(g);OGATEB,P_SPINP(g)::QAB(G)
      • Refutation
        • P(g);XQ(G)
  • Actual
    • R(E);CHECK
    • Vars
      • P(f);SBLOCK,XR(E)::S(B)
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