MESON Chess Problem Database
Problem Display
PID: 247576 (2Q2R1N/r2p3P/p1P1BP1r/4k3/3R1N2/4P1n1/K3p3/8 w - - 0 1)
Chepizhni, Viktor Ivanovich
Melnichenko, Viktor Oleksandrovich
Zadachi i Etyudi, 2003
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Shg6#
- 1...Rh2
- 2.Shg6#
- 1...Rh3
- 2.Shg6#
- 1...Rh4
- 2.Shg6#
- 1...Rh5
- 2.Shg6#
- 1...Rg6
- 2.Shxg6#
- 1...Rxh7
- 2.Shg6#
- 1...Se4
- 2.Rd5#
- 1...dxc6
- 2.Sd3#
- 1...dxe6
- 2.Qxe6#
- 1...d6
- 2.Sd3#
- 1...Rh1
- Tries
- 1.Bg4?
- threat
- 2.Sd3#
- 2.Qe8#
- 1...Rxf6
- 2.Sd3#
- 1...Rxh7
- 2.Sd3#
- 2.Sfg6#
- 2.Shg6#
- 1...dxc6
- 2.Sd3#
- 2.Qe6#
- 1...d5
- 2.Qe6#
- 1...e1S
- 2.Qe8#
- 1...Ra8
- 2.Sd3#
- 1...d6
- 2.Sd3#
- 2.Qe6#
- 1...Sf5!
- threat
- 1.Bxd7?
- threat
- 2.Sd3#
- 2.Qe8#
- 1...Rxf6
- 2.Sd3#
- 1...Rxh7
- 2.Sd3#
- 2.Sfg6#
- 2.Shg6#
- 1...e1S
- 2.Qe8#
- 1...Sf5
- 2.Sd3#
- 1...Ra8
- 2.Sd3#
- 2.Qc7#
- 1...Rxd7!
- threat
- 1.Qxd7?
- threat
- 2.Sd3#
- 2.Qd5#
- 2.Qd6#
- 1...e1S
- 2.Qd5#
- 2.Qd6#
- 1...Sf5
- 2.Sd3#
- 2.Qd5#
- 1...Se4
- 2.Sd3#
- 2.Rd5#
- 2.Qd5#
- 1...Rxd7!
- threat
- 1.Qc7+?
- 1...d6
- 2.Qxd6#
- 1...Rxc7!
- 1...d6
- 1.Qb8+?
- 1...d6
- 2.Qxd6#
- 1...Rc7!
- 1...d6
- 1.Qe8?
- threat
- 2.Sd3#
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 1...Rxf6
- 2.Sd3#
- 1...Rxh7
- 2.Sd3#
- 2.Sfg6#
- 2.Shg6#
- 1...dxc6
- 2.Sd3#
- 2.Bd7#
- 1...dxe6
- 2.Qxe6#
- 1...e1S
- 2.Bh3#
- 2.Bg4#
- 2.Bxd7#
- 1...Sf5
- 2.Sd3#
- 1...Rh3
- 2.Sd3#
- 2.Sfg6#
- 2.Shg6#
- 2.Bxh3#
- 2.Bg4#
- 2.Bxd7#
- 1...Ra8
- 2.Sd3#
- 1...d6
- 2.Sd3#
- 2.Bd7#
- 1...d5!
- threat
- 1.cxd7?
- threat
- 2.Qc5#
- 1...Rc7
- 2.Qxc7#
- 1...Se4
- 2.Rd5#
- 1...Rxd7!
- threat
- 1.Bg4?
- Keys
- 1.Qd8!
- threat
- 2.Sf7#
- 1...Rxf6
- 2.Qxf6#
- 1...Rxh7
- 2.Shg6#
- 1...dxc6
- 2.Qd6#
- 1...dxe6
- 2.Qa5#
- 1...d5
- 2.Qxd5#
- 1...d6
- 2.Qxd6#
- threat
- 1.Qd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- R(e);N_GUARD::S(K)
- R(e);N_GUARD::S(K),XR(e)
- R(e);N_GUARD,XP(H)::S(K)
- S(b);SBLOCK::R1(C)
- P(g);XP(E)::S(D)
- P(g);OGATE,XB(F)::QAR1(I),XP(g)
- P(g);::S(D)
- Tries
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(e);XP(G)::S(D)
- P(g);OGATE::QAR1(I)
- P(a);::QAR(I)
- R(f);::S(D)
- Refutation
- S(b);
- Try
- B(F);XP(g)
- Threat
- DUALS(2)
- Vars
- R(e);XP(G)::S(D)
- P(a);::QAR(I)
- S(b);::S(D)
- Refutation
- R(f);XB(F)
- Try
- Q(I);XP(g)
- Threat
- DUALS(3)
- Refutation
- R(f);XQ(I)
- Try
- Q(I);CHECK
- Vars
- P(g);P_SPINP(g)::QAB1(I),XP(g)
- Refutation
- R(f);XQ(I)
- Try
- Q(I);CHECK
- Vars
- P(g);P_SPINP(g)::QAB1(I),XP(g)
- Refutation
- R(f);P_SPINR(f)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- R(e);XP(G)::S(D)
- P(g);OGATE,P_SPINP(g),XB(F)::QAR1(I),XP(g)
- S(b);::S(D)
- R(f);::S(D)
- Refutation
- P(g);
- Try
- P(E);XP(g)
- Threat
- QAR2(I)
- Vars
- R(f);N_GUARD::QAB(I),XR(f)
- S(b);SBLOCK::R1(C)
- Refutation
- R(f);XP(E)
- Try
- Actual
- Q(I);
- Threat
- S(K)
- Vars
- R(e);OGATE,XP(G)::QAB1(I),XR(e)
- R(e);N_GUARD,XP(H)::S(K)
- P(g);OGATE,XP(E)::QAB1(I)
- P(g);N_GUARD,XB(F)::QAR(I)
- P(g);OGATE::QAR1(I),XP(g)
- P(g);OGATE::QAB1(I),XP(g)
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).