MESON Chess Problem Database
Problem Display
PID: 265307 (4NBK1/3p1PP1/2r5/1Ppk4/3b2Q1/1P1R1Nn1/3P4/8 w - - 0 1)
Lewis, Robert Tony
The Problemist, 1994
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Ra6
- 2.Sc7#
- 1...Rb6
- 2.Sc7#
- 1...Rd6
- 2.Sc7#
- 1...Re6
- 2.Sc7#
- 1...Rf6
- 2.Sxf6#
- 2.Sc7#
- 1...Rg6
- 2.Sc7#
- 1...Rh6
- 2.Sc7#
- 1...Rc7
- 2.Sf6#
- 2.Sxc7#
- 1...Rc8
- 2.Sf6#
- 1...Sf1
- 2.Qf5#
- 1...Sh1
- 2.Qf5#
- 1...Se2
- 2.Qf5#
- 1...Se4
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sh5
- 2.Qf5#
- 1...c4
- 2.Rxd4#
- 1...d6
- 2.Sf6#
- 1...Ra6
- Tries
- 1.Kh7?
- 1...Sf5
- 2.Qxf5#
- 1...Ra6
- 2.Sc7#
- 1...Rb6
- 2.Sc7#
- 1...Rd6
- 2.Sc7#
- 1...Re6
- 2.Sc7#
- 1...Rf6
- 2.Sxf6#
- 2.Sc7#
- 1...Rg6
- 2.Sc7#
- 1...Rc7
- 2.Sf6#
- 2.Sxc7#
- 1...Rc8
- 2.Sf6#
- 1...Sf1
- 2.Qf5#
- 1...Sh1
- 2.Qf5#
- 1...Se2
- 2.Qf5#
- 1...Se4
- 2.Qf5#
- 1...Sh5
- 2.Qf5#
- 1...c4
- 2.Rxd4#
- 1...d6
- 2.Sf6#
- 1...Rh6+!
- 1...Sf5
- 1.Kh8?
- 1...Sf5
- 2.Qxf5#
- 1...Ra6
- 2.Sc7#
- 1...Rb6
- 2.Sc7#
- 1...Rd6
- 2.Sc7#
- 1...Re6
- 2.Sc7#
- 1...Rf6
- 2.Sxf6#
- 2.Sc7#
- 1...Rg6
- 2.Sc7#
- 1...Rc7
- 2.Sf6#
- 2.Sxc7#
- 1...Rc8
- 2.Sf6#
- 1...Sf1
- 2.Qf5#
- 1...Sh1
- 2.Qf5#
- 1...Se2
- 2.Qf5#
- 1...Se4
- 2.Qf5#
- 1...Sh5
- 2.Qf5#
- 1...c4
- 2.Rxd4#
- 1...d6
- 2.Sf6#
- 1...Rh6+!
- 1...Sf5
- 1.Be7?
- 1...Sf5
- 2.Qxf5#
- 1...Ra6
- 2.Sc7#
- 1...Rb6
- 2.Sc7#
- 1...Rd6
- 2.Sc7#
- 1...Re6
- 2.Sc7#
- 1...Rf6
- 2.Sxf6#
- 2.Sc7#
- 1...Rg6
- 2.Sc7#
- 1...Rh6
- 2.Sc7#
- 1...Rc7
- 2.Sf6#
- 2.Sxc7#
- 1...Sf1
- 2.Qf5#
- 1...Sh1
- 2.Qf5#
- 1...Se2
- 2.Qf5#
- 1...Se4
- 2.Qf5#
- 1...Sh5
- 2.Qf5#
- 1...c4
- 2.Rxd4#
- 1...d6
- 2.Sf6#
- 1...Rc8!
- 1...Sf5
- 1.Qxd7+?
- 1...Rd6
- 2.Sf6#
- 1...Ke4!
- 1...Rd6
- 1.Qxd4+?
- 1...Ke6
- 2.Qe5#
- 2.Qf6#
- 2.Qd5#
- 2.Qxd7#
- 1...cxd4!
- 1...Ke6
- 1.Kh7?
- Keys
- 1.Re3!
- 1...Bxe3
- 2.Qc4#
- 1...Bxg7
- 2.Qc4#
- 1...Ra6
- 2.Sc7#
- 1...Rb6
- 2.Sc7#
- 1...Rd6
- 2.Sc7#
- 1...Re6
- 2.Sc7#
- 1...Rf6
- 2.Sc7#
- 1...Rg6
- 2.Sc7#
- 1...Rh6
- 2.Sc7#
- 1...Rc7
- 2.Sxc7#
- 1...Rc8
- 2.Qxd7#
- 1...Ba1
- 2.Qc4#
- 1...Bb2
- 2.Qc4#
- 1...Bc3
- 2.Qc4#
- 1...Be5
- 2.Rxe5#
- 2.Qc4#
- 1...Bf6
- 2.Qc4#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...c4
- 2.Qxd4#
- 1...d6
- 2.Qe6#
- 1...Bxe3
- 1.Re3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- R(e);N_GUARD::S(I)
- R(e);N_GUARD,P_PINP(H)::S(I)
- S(a);N_GUARD::QAR2(E)
- S(a);N_GUARD::QAR2(E),XS(a)
- P(c);N_GUARD::R1(C),XB(b)
- P(f);S_CUTR(e)::S(I)
- Tries
- Try
- K(K);S_FLIGHT
- Vars
- S(a);N_GUARD::QAR2(E),XS(a)
- R(e);N_GUARD::S(I)
- S(a);N_GUARD::QAR2(E)
- P(c);N_GUARD::R1(C),XB(b)
- P(f);S_CUTR(e)::S(I)
- Refutation
- R(e);CHECK
- Try
- K(K);P-FLIGHT,P_SPINP(H)
- Vars
- S(a);N_GUARD::QAR2(E),XS(a)
- R(e);N_GUARD::S(I)
- S(a);N_GUARD::QAR2(E)
- P(c);N_GUARD::R1(C),XB(b)
- P(f);S_CUTR(e)::S(I)
- Refutation
- R(e);CHECK
- Try
- B(J);
- Vars
- S(a);N_GUARD::QAR2(E),XS(a)
- R(e);N_GUARD::S(I)
- R(e);N_GUARD,P_PINP(H)::S(I)
- S(a);N_GUARD::QAR2(E)
- P(c);N_GUARD::R1(C),XB(b)
- P(f);S_CUTR(e)::S(I)
- Refutation
- R(e);P_PINS(I)
- Try
- Q(E);CHECK,XP(f)
- Vars
- R(e);P_SPINR(e)::S(I)
- Refutation
- K(d);N_SPINB(b),S_FLIGHT
- Try
- Q(E);CHECK,XB(b)
- Refutation
- P(c);P_SPINP(c),XQ(E)
- Try
- Actual
- R(C);N_PINB(b)
- Vars
- B(b);OGATE,XR(C)::QAB1(E)
- B(b);OGATE,XP(H)::QAB1(E)
- R(e);N_GUARD::S(I)
- R(e);N_GUARD,P_PINP(H)::S(I)
- R(e);N_GUARD::S(I),XR(e)
- R(e);N_GUARD::QAR2(E),XP(f)
- B(b);OGATE::QAB1(E)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- P(c);N_GUARD::QAR1(E),XB(b)
- P(f);N_GUARD,S_CUTR(e)::QAB1(E)
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).