MESON Chess Problem Database
Problem Display
PID: 73383 (3b1Q1n/1q1Bp2K/3B1P1p/3k3r/n1N1R1R1/8/N7/3r4 w - - 0 1)
Chepizhni, Viktor Ivanovich
Melnichenko, Emil
1st Comm., Biscan MT, 2006
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qa6
- 2.Sb4#
- 1...Qc6
- 2.Sb4#
- 2.Be6#
- 1...Qa8
- 2.Sb4#
- 1...Qc8
- 2.Sb4#
- 1...Qb4
- 2.Sxb4#
- 1...Qa7
- 2.Sb4#
- 1...Qc7
- 2.Sb4#
- 1...Qxd7
- 2.Sb4#
- 1...Ra1
- 2.Rd4#
- 1...Rb1
- 2.Rd4#
- 1...Rc1
- 2.Rd4#
- 1...Re1
- 2.Rd4#
- 1...Rf1
- 2.Rd4#
- 1...Rg1
- 2.Rd4#
- 1...Rdh1
- 2.Rd4#
- 1...Rd4
- 2.Rxd4#
- 1...Rhh1
- 2.Re5#
- 1...Rh2
- 2.Re5#
- 1...Rh3
- 2.Re5#
- 1...Rh4
- 2.Re5#
- 1...Re5
- 2.Rxe5#
- 1...Bb6
- 2.Sb4#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sc5
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 2.Sb4#
- 1...exd6
- 2.Qxd6#
- 1...exf6
- 2.Se3#
- 1...e5
- 2.Se3#
- 1...e6
- 2.Se3#
- 1...Qa6
- Tries
- 1.Bc6+?
- 1...Qxc6
- 2.Sb4#
- 1...Kxc6!
- 1...Qxc6
- 1.Qxe7?
- threat
- 2.Se3#
- 2.Qe6#
- 1...Qxd7
- 2.Sb4#
- 1...Qb3
- 2.Qe6#
- 1...Qb6
- 2.Qe6#
- 1...Qa7
- 2.Sb4#
- 2.Qe6#
- 1...Re1
- 2.Rd4#
- 2.Qe6#
- 1...Rd3
- 2.Qe6#
- 1...Rh3
- 2.Re5#
- 2.Qe5#
- 2.Qe6#
- 1...Re5
- 2.Se3#
- 2.Rxe5#
- 2.Qxe5#
- 1...Bb6
- 2.Sb4#
- 2.Qe6#
- 1...Sc5
- 2.Sc3#
- 2.Se3#
- 1...Bxe7!
- threat
- 1.Qf7+?
- 1...e6
- 2.Qxe6#
- 1...Sxf7!
- 1...e6
- 1.Qg8+?
- 1...e6
- 2.Qxe6#
- 1...Sf7!
- 1...e6
- 1.Bc6+?
- Keys
- 1.Qe8!
- threat
- 2.Be6#
- 1...Qxd7
- 2.Sb4#
- 1...exd6
- 2.Qxh5#
- 1...exf6
- 2.Qe6#
- 1...Qc8
- 2.Sb4#
- 1...Re5
- 2.Rxe5#
- 1...Sc5
- 2.Sc3#
- 1...e5
- 2.Qe6#
- 1...e6
- 2.Qxe6#
- threat
- 1.Qe8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 20
- Sets
- Q(f);N_GUARD::S(A)
- Q(f);N_GUARD::S(A),XQ(f)
- Q(f);N_GUARD,XB(G)::S(A)
- R(a);N_GUARD::R1(C)
- R(a);N_GUARD::R1(C),XR(a)
- R(d);N_GUARD::R1(C)
- R(d);N_GUARD::R1(C),XR(d)
- B(h);S_CUTQ(f)::S(A)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- P(g);OGATE,P_PINB(G),XB(E)::QAR1(I),XP(g)
- P(g);P_PINB(G),XP(F)::S(B)
- P(g);P_PINB(G)::S(B)
- Tries
- Try
- B(G);CHECK
- Vars
- Q(f);XB(G)::S(A)
- Refutation
- K(c);S_FLIGHT,XB(G)
- Try
- Q(I);XP(g)
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD,P_PINQ(I),XB(G)::S(A)
- Q(f);::QAB1(I)
- R(a);::QAB1(I)
- Refutation
- B(h);XQ(I)
- Try
- Q(I);CHECK
- Vars
- P(g);P_SPINP(g)::QAB1(I),XP(g)
- Refutation
- S(i);XQ(I)
- Try
- Q(I);CHECK
- Vars
- P(g);P_PINB(G),P_SPINP(g)::QAB1(I),XP(g)
- Refutation
- S(i);P_SPINS(i)
- Try
- Actual
- Q(I);
- Threat
- B(G)
- Vars
- Q(f);N_GUARD,XB(G)::S(A)
- P(g);N_GUARD,P_PINB(G),XB(E)::QAR(I),XR(d)
- P(g);OGATE,P_PINB(G),XP(F)::QAB1(I)
- Q(f);N_GUARD::S(A)
- R(d);N_GUARD::R1(C),XR(d)
- S(b);N_GUARD::S(A)
- P(g);OGATE,P_PINB(G)::QAB1(I)
- P(g);OGATE,P_PINB(G)::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).