MESON Chess Problem Database
Problem Display
PID: 268332 (BKn5/2P2N2/7R/8/RBnk1bQq/2p5/r1P5/5N2 w - - 0 1)
Melnichenko, Viktor Oleksandrovich
3rd HM., KeyStip 27A. Ty., 1981
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Qd8
- 2.Qxf4#
- 1...Qh3
- 2.Qxf4#
- 1...Qh5
- 2.Qxf4#
- 1...Sa3
- 2.Bxa3#
- 1...Qd8
- Tries
- 1.Qe2?
- threat
- 2.Qd3#
- 2.Qe4#
- 1...Rxc2
- 2.Qe4#
- 1...Bxh6
- 2.Qd3#
- 1...Qe1
- 2.Qd3#
- 1...Qg3
- 2.Qe4#
- 1...Qe7
- 2.Qd3#
- 1...Qh1
- 2.Qd3#
- 1...Qh3
- 2.Qe4#
- 1...Bc1
- 2.Qd3#
- 1...Bd2
- 2.Qd3#
- 1...Bh2
- 2.Qd3#
- 1...Be3
- 2.Qd3#
- 1...Bg3
- 2.Qd3#
- 1...Be5
- 2.Qd3#
- 1...Bg5
- 2.Qd3#
- 1...Bd6
- 2.Qd3#
- 1...Sb2
- 2.Qe4#
- 1...Sd2
- 2.Qd3#
- 1...Se3
- 2.Qd3#
- 1...Se5
- 2.Qe4#
- 1...S4d6
- 2.Qd3#
- 1...S8d6
- 2.Qd3#
- 1...Bxc7+!
- threat
- 1.Qf3?
- threat
- 2.Qe4#
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Rxc2
- 2.Qe4#
- 2.Qd5#
- 1...Bxh6
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Sb2
- 2.Qe4#
- 2.Qd5#
- 2.Qxc3#
- 1...Sd2
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Se3
- 2.Qe4#
- 1...Se5
- 2.Qe4#
- 2.Qd5#
- 2.Qxc3#
- 1...S4b6
- 2.Qe4#
- 2.Qxc3#
- 2.Qd3#
- 1...S4d6
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Qe1
- 2.Qd5#
- 2.Qd3#
- 1...Qg3
- 2.Qe4#
- 2.Qd5#
- 1...Qg5
- 2.Qe4#
- 2.Qxc3#
- 2.Qd3#
- 1...Qe7
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Qd8
- 2.Qe4#
- 2.Qxc3#
- 2.Qd3#
- 2.Qxf4#
- 1...Qh1
- 2.Qxc3#
- 2.Qd3#
- 1...Qh3
- 2.Qe4#
- 2.Qd5#
- 2.Qxf4#
- 1...Qh5
- 2.Qe4#
- 2.Qxc3#
- 2.Qd3#
- 2.Qxf4#
- 1...Ra3
- 2.Qe4#
- 2.Qd5#
- 2.Qd3#
- 1...Bc1
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Bd2
- 2.Qd5#
- 2.Qd3#
- 1...Bh2
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Be3
- 2.Qd5#
- 1...Bg3
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Be5
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Bg5
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Bd6
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...S8b6
- 2.Qe4#
- 2.Qxc3#
- 2.Qd3#
- 1...S8d6
- 2.Qd5#
- 2.Qxc3#
- 2.Qd3#
- 1...Se7
- 2.Qe4#
- 2.Qxc3#
- 2.Qd3#
- 1...Bxc7+!
- threat
- 1.Qf5?
- threat
- 2.Bc5#
- 2.Qd3#
- 2.Qe4#
- 2.Qc5#
- 2.Qd5#
- 1...Rxc2
- 2.Bc5#
- 2.Qe4#
- 2.Qd5#
- 1...Bxh6
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Sb2
- 2.Bc5#
- 2.Qe4#
- 2.Qc5#
- 2.Qd5#
- 1...Sd2
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Se3
- 2.Bc5#
- 2.Qd3#
- 2.Qe4#
- 2.Qc5#
- 1...Se5
- 2.Qe4#
- 1...S4b6
- 2.Bc5#
- 2.Qd3#
- 2.Qe4#
- 2.Qc5#
- 1...S4d6
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Qe1
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Qg3
- 2.Bc5#
- 2.Qe4#
- 2.Qc5#
- 2.Qd5#
- 1...Qg5
- 2.Bc5#
- 2.Qd3#
- 2.Qe4#
- 1...Qe7
- 2.Qd3#
- 2.Qd5#
- 1...Qd8
- 2.Bc5#
- 2.Qd3#
- 2.Qe4#
- 2.Qxf4#
- 2.Qc5#
- 1...Qh1
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 1...Qh3
- 2.Bc5#
- 2.Qe4#
- 2.Qxf4#
- 2.Qc5#
- 2.Qd5#
- 1...Qh5
- 2.Bc5#
- 2.Qd3#
- 2.Qe4#
- 2.Qxf4#
- 1...Rb2
- 2.Qd3#
- 2.Qe4#
- 2.Qc5#
- 2.Qd5#
- 1...Bc1
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Bd2
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Bh2
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Be3
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Bg3
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Be5
- 2.Qd3#
- 1...Bg5
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Bd6
- 2.Qd3#
- 2.Qd5#
- 1...S8b6
- 2.Bc5#
- 2.Qd3#
- 2.Qe4#
- 2.Qc5#
- 1...S8d6
- 2.Bc5#
- 2.Qd3#
- 2.Qc5#
- 2.Qd5#
- 1...Se7
- 2.Bc5#
- 2.Qd3#
- 2.Qe4#
- 2.Qc5#
- 1...Bxc7+!
- threat
- 1.Qd7+?
- 1...Bd6
- 2.Rxh4#
- 1...S4d6
- 2.Ba3#
- 1...S8d6!
- 1...Bd6
- 1.Qg1+?
- 1...Be3
- 2.Rxh4#
- 1...Se3
- 2.Ba3#
- 1...Qf2!
- 1...Be3
- 1.Qg6?
- threat
- 2.Qd3#
- 2.Qe4#
- 1...Rxc2
- 2.Qe4#
- 1...Bxh6
- 2.Qd3#
- 1...Sb2
- 2.Qe4#
- 1...Sd2
- 2.Qd3#
- 1...Se5
- 2.Qe4#
- 1...S4d6
- 2.Qd3#
- 1...Qh1
- 2.Qd3#
- 1...Qe1
- 2.Qd3#
- 1...Qg3
- 2.Qe4#
- 1...Qe7
- 2.Qd3#
- 1...Qh3
- 2.Qe4#
- 1...Bc1
- 2.Qd3#
- 1...Bd2
- 2.Qd3#
- 1...Bh2
- 2.Qd3#
- 1...Be3
- 2.Qd3#
- 1...Bg3
- 2.Qd3#
- 1...Be5
- 2.Qd3#
- 1...Bg5
- 2.Qd3#
- 1...Bd6
- 2.Qd3#
- 1...S8d6
- 2.Qd3#
- 1...Bxc7+!
- threat
- 1.Qg7+?
- 1...Be5
- 2.Rxh4#
- 1...Se5
- 2.Ba3#
- 1...Qf6!
- 1...Be5
- 1.Qe2?
- Keys
- 1.Qd1+!
- 1...Bd2
- 2.Rxh4#
- 1...Sd2
- 2.Ba3#
- 1...Bd2
- 1.Qd1+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- Q(f);N_GUARD::QAR2(E),XB(e)
- S(c);OGATEB::R(C)+B(D),XS(c)
- Tries
- Try
- Q(E);N_PINB(e)
- Threat
- DUALS(2)
- Vars
- R(a);XP(B)::QAR1(E)
- B(e);N_PINP(G),XR(F)::QAR1(E)
- Q(f);::QAR1(E)
- B(e);N_PINP(G)::QAR1(E)
- B(e);::QAR1(E)
- S(c);::QAR1(E)
- S(c);N_PINP(G)::QAR1(E)
- S(g);N_PINP(G)::QAR1(E)
- Refutation
- B(e);CHECK,XP(G)
- Try
- Q(E);N_PINB(e)
- Threat
- DUALS(4)
- Vars
- S(c);::QAR1(E)
- B(e);N_PINP(G)::QAR1(E)
- Refutation
- B(e);CHECK,XP(G)
- Try
- Q(E);N_PINB(e)
- Threat
- DUALS(5)
- Vars
- S(c);N_PINP(G)::QAR1(E)
- B(e);::QAR1(E)
- Refutation
- B(e);CHECK,XP(G)
- Try
- Q(E);CHECK,N_PINB(e)
- Vars
- B(e);P_SPINB(e),S_CUTS(c),S_CUTS(g)::R(F),XQ(f)
- S(c);N_PINP(G),P_SPINS(c),S_CUTB(e),S_CUTS(g)::R(C)+B(D)
- Refutation
- S(g);N_PINP(G),P_SPINS(g)
- Try
- Q(E);CHECK,N_PINB(e)
- Vars
- B(e);N_PINP(G),P_SPINB(e),S_CUTS(c)::R(F),XQ(f)
- S(c);P_SPINS(c),S_CUTB(e),S_CUTQ(f)::R(C)+B(D)
- Refutation
- Q(f);P_SPINQ(f)
- Try
- Q(E);N_PINB(e)
- Threat
- DUALS(2)
- Vars
- R(a);XP(B)::QAR1(E)
- B(e);N_PINP(G),XR(F)::QAR1(E)
- S(c);::QAR1(E)
- S(c);N_PINP(G)::QAR1(E)
- Q(f);::QAR1(E)
- B(e);N_PINP(G)::QAR1(E)
- B(e);::QAR1(E)
- S(g);N_PINP(G)::QAR1(E)
- Refutation
- B(e);CHECK,XP(G)
- Try
- Q(E);CHECK,N_PINB(e)
- Vars
- B(e);P_SPINB(e),S_CUTS(c)::R(F),XQ(f)
- S(c);N_PINP(G),P_SPINS(c),S_CUTB(e),S_CUTQ(f)::R(C)+B(D)
- Refutation
- Q(f);P_SPINQ(f)
- Try
- Actual
- Q(E);CHECK,N_PINB(e)
- Vars
- B(e);N_PINP(G),P_SPINB(e),S_CUTS(c)::R(F),XQ(f)
- S(c);P_SPINS(c),S_CUTB(e)::R(C)+B(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).