MESON Chess Problem Database
Problem Display
PID: 197364 (8/4p3/5p2/3BBk1K/2N4Q/5r1b/3n4/8 w - - 0 1)
Lewis, Robert Tony
The Problemist, 1981
#2
5 + 6
SOLUTION
- SOUND
- Sets
- 1...Rf1
- 2.Qxh3#
- 1...Rf2
- 2.Qxh3#
- 1...Ra3
- 2.Qf4#
- 1...Rb3
- 2.Qf4#
- 1...Rc3
- 2.Qf4#
- 1...Rd3
- 2.Qf4#
- 1...Re3
- 2.Qf4#
- 1...Rg3
- 2.Qf4#
- 1...Rf4
- 2.Qxf4#
- 1...Bf1
- 2.Qg4#
- 1...Bg2
- 2.Qg4#
- 1...Bg4+
- 2.Qxg4#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Sxc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...fxe5
- 2.Qg5#
- 1...e6
- 2.Qxf6#
- 1...Rf1
- Tries
- 1.Kh6?
- threat
- 2.Qh5#
- 1...fxe5
- 2.Qg5#
- 1...Rg3
- 2.Qf4#
- 1...Se4
- 2.Qxe4#
- 1...Bg4!
- threat
- 1.Se3+?
- 1...Rxe3
- 2.Qf4#
- 1...Kxe5!
- 1...Rxe3
- 1.Sd6+?
- 1...exd6
- 2.Qxf6#
- 1...Kxe5!
- 1...exd6
- 1.Bh2?
- 1...Bg4+
- 2.Qxg4#
- 1...Sxc4
- 2.Qe4#
- 1...Ra3
- 2.Qf4#
- 1...Rf1
- 2.Se3#
- 2.Qxh3#
- 1...Rf2
- 2.Se3#
- 2.Qxh3#
- 1...Rb3
- 2.Qf4#
- 1...Rc3
- 2.Qf4#
- 1...Rd3
- 2.Qf4#
- 1...Re3
- 2.Sxe3#
- 2.Qf4#
- 1...Rf4
- 2.Qxf4#
- 1...Bf1
- 2.Qg4#
- 1...Bg2
- 2.Qg4#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...e5
- 2.Sd6#
- 1...e6
- 2.Sd6#
- 1...Rg3!
- 1...Bg4+
- 1.Bg3?
- threat
- 2.Qxh3#
- 1...Bg4+
- 2.Qxg4#
- 1...Rf4
- 2.Qxf4#
- 1...Bf1
- 2.Qg4#
- 1...Bg2
- 2.Qg4#
- 1...Rxg3!
- threat
- 1.Bc7?
- 1...Bg4+
- 2.Qxg4#
- 1...Sxc4
- 2.Qe4#
- 1...Ra3
- 2.Qf4#
- 1...Rf1
- 2.Se3#
- 2.Qxh3#
- 1...Rf2
- 2.Se3#
- 2.Qxh3#
- 1...Rb3
- 2.Qf4#
- 1...Rc3
- 2.Qf4#
- 1...Rd3
- 2.Qf4#
- 1...Re3
- 2.Sxe3#
- 2.Qf4#
- 1...Rg3
- 2.Qf4#
- 1...Rf4
- 2.Se3#
- 2.Qxf4#
- 1...Bf1
- 2.Qg4#
- 1...Bg2
- 2.Qg4#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...e5
- 2.Sd6#
- 1...e6!
- 1...Bg4+
- 1.Bb8?
- 1...Bg4+
- 2.Qxg4#
- 1...Sxc4
- 2.Qe4#
- 1...Ra3
- 2.Qf4#
- 1...Rf1
- 2.Se3#
- 2.Qxh3#
- 1...Rf2
- 2.Se3#
- 2.Qxh3#
- 1...Rb3
- 2.Qf4#
- 1...Rc3
- 2.Qf4#
- 1...Rd3
- 2.Qf4#
- 1...Re3
- 2.Sxe3#
- 2.Qf4#
- 1...Rg3
- 2.Qf4#
- 1...Rf4
- 2.Se3#
- 2.Qxf4#
- 1...Bf1
- 2.Qg4#
- 1...Bg2
- 2.Qg4#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...e5
- 2.Sd6#
- 1...e6!
- 1...Bg4+
- 1.Kh6?
- Keys
- 1.Qd4!
- 1...Bg4+
- 2.Qxg4#
- 1...Sxc4
- 2.Qe4#
- 1...fxe5
- 2.Qxe5#
- 1...Ra3
- 2.Qf4#
- 1...Rf1
- 2.Se3#
- 1...Rf2
- 2.Se3#
- 1...Rb3
- 2.Qf4#
- 1...Rc3
- 2.Qf4#
- 1...Rd3
- 2.Qf4#
- 1...Re3
- 2.Sxe3#
- 2.Qf4#
- 1...Rg3
- 2.Qf4#
- 1...Rf4
- 2.Se3#
- 2.Qxf4#
- 1...Bf1
- 2.Qg4#
- 1...Bg2
- 2.Qg4#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...e6
- 2.Sd6#
- 1...Bg4+
- 1.Qd4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(b);N_GUARD::QAB(B),XB(c)
- R(b);N_GUARD::QAR1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- B(c);N_GUARD::QAB1(B)
- B(c);CHECK,N_GUARD::QAB1(B),XB(c)
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD,XS(A)::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- P(e);N_GUARD,XB(D)::QAR1(B)
- P(f);N_GUARD::QAR1(B),XP(e)
- Tries
- Try
- K(E);P-FLIGHT
- Threat
- QAR2(B)
- Vars
- P(e);N_GUARD,XB(D)::QAR1(B)
- R(b);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- B(c);
- Try
- S(A);CHECK
- Vars
- R(b);XS(A)::QAR1(B)
- Refutation
- K(d);P-FLIGHT,XB(D)
- Try
- S(A);CHECK
- Vars
- P(f);XS(A)::QAR1(B),XP(e)
- Refutation
- K(d);P-FLIGHT,XB(D)
- Try
- B(D);
- Vars
- B(c);CHECK,N_GUARD::QAB1(B),XB(c)
- S(a);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B)
- R(b);N_GUARD::QAR1(B),XR(b)
- B(c);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- P(f);N_GUARD::S(A)
- Refutation
- R(b);
- Try
- B(D);
- Threat
- QAB(B),XB(c)
- Vars
- B(c);CHECK,N_GUARD::QAB1(B),XB(c)
- R(b);N_GUARD::QAR1(B),XR(b)
- B(c);N_GUARD::QAB1(B)
- Refutation
- R(b);XB(D)
- Try
- B(D);
- Vars
- B(c);CHECK,N_GUARD::QAB1(B),XB(c)
- S(a);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B)
- B(c);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- P(f);N_GUARD,SBLOCK::S(A)
- Refutation
- P(f);
- Try
- B(D);
- Vars
- B(c);CHECK,N_GUARD::QAB1(B),XB(c)
- S(a);N_GUARD,XS(A)::QAB1(B)
- R(b);N_GUARD::QAR1(B)
- B(c);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- P(f);N_GUARD,SBLOCK::S(A)
- Refutation
- P(f);
- Try
- Actual
- Q(B);
- Vars
- B(c);CHECK,N_GUARD::QAB1(B),XB(c)
- S(a);N_GUARD,XS(A)::QAB1(B)
- P(e);OGATE,XB(D)::QAR1(B),XP(e)
- R(b);N_GUARD::QAR1(B)
- R(b);N_GUARD::S(A)
- B(c);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- P(f);N_GUARD::S(A)
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).