MESON Chess Problem Database
Problem Display
PID: 200091 (8/3R1pK1/2n1p3/1pP5/1pkP3p/1N1p3B/PP4Q1/3r4 w - - 0 1)
Brown, David Leo
The Problemist, 1982
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sxd4
- 2.Rxd4#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...d2
- 2.Qe2#
- 1...e5
- 2.Qd5#
- 1...f6
- 2.Bxe6#
- 1...Ra1
- Tries
- 1.Kf6?
- 1...Sxd4
- 2.Rxd4#
- 1...d2
- 2.Qe2#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...e5
- 2.Qd5#
- 1...Rf1+!
- 1...Sxd4
- 1.Kh6?
- 1...Sxd4
- 2.Rxd4#
- 1...d2
- 2.Qe2#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...e5
- 2.Qd5#
- 1...f6
- 2.Bxe6#
- 1...f5!
- 1...Sxd4
- 1.Kh7?
- 1...Sxd4
- 2.Rxd4#
- 1...d2
- 2.Qe2#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...e5
- 2.Qd5#
- 1...f6
- 2.Bxe6#
- 1...f5!
- 1...Sxd4
- 1.Kf8?
- 1...Sxd4
- 2.Rxd4#
- 1...d2
- 2.Qe2#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...e5
- 2.Qd5#
- 1...f6
- 2.Bxe6#
- 1...f5!
- 1...Sxd4
- 1.Kh8?
- 1...Sxd4
- 2.Rxd4#
- 1...d2
- 2.Qe2#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...e5
- 2.Qd5#
- 1...f6
- 2.Bxe6#
- 1...f5!
- 1...Sxd4
- 1.Bf5?
- 1...Sxd4
- 2.Rxd4#
- 1...exf5
- 2.Qd5#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...d2
- 2.Qe2#
- 1...e5
- 2.Qd5#
- 1...f6
- 2.Bxe6#
- 1...h3!
- 1...Sxd4
- 1.Rd6?
- 1...Sxd4
- 2.Rxd4#
- 1...d2
- 2.Qe2#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...e5
- 2.Qd5#
- 1...f6
- 2.Bxe6#
- 1...f5!
- 1...Sxd4
- 1.Qf1?
- 1...Rxf1
- 2.Sd2#
- 1...Sxd4
- 2.Rxd4#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 2.Qxc1#
- 1...Re1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...e5
- 2.Qxf7#
- 1...f6
- 2.Bxe6#
- 1...f5!
- 1...Rxf1
- 1.Qe4?
- 1...Sxd4
- 2.Rxd4#
- 2.Qxd4#
- 1...f5
- 2.Qxe6#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 2.d5#
- 1...Se5
- 2.Sa5#
- 2.dxe5#
- 2.d5#
- 1...Sa7
- 2.Sa5#
- 2.d5#
- 1...Se7
- 2.Sa5#
- 2.d5#
- 1...Sb8
- 2.Sa5#
- 2.d5#
- 1...Sd8
- 2.Sa5#
- 2.d5#
- 1...d2
- 2.Qc2#
- 2.Qe2#
- 1...e5
- 2.Qd5#
- 1...f6
- 2.Bxe6#
- 2.Qxe6#
- 1...Rg1+!
- 1...Sxd4
- 1.Kf6?
- Keys
- 1.Qg6!
- 1...Sxd4
- 2.Rxd4#
- 1...fxg6
- 2.Bxe6#
- 1...f5
- 2.Qxe6#
- 1...Ra1
- 2.Sd2#
- 1...Rb1
- 2.Sd2#
- 1...Rc1
- 2.Sd2#
- 1...Re1
- 2.Sd2#
- 1...Rf1
- 2.Sd2#
- 1...Rg1
- 2.Sd2#
- 1...Rh1
- 2.Sd2#
- 1...Rd2
- 2.Sxd2#
- 1...Sa5
- 2.Sxa5#
- 1...Se5
- 2.Sa5#
- 1...Sa7
- 2.Sa5#
- 1...Se7
- 2.Sa5#
- 1...Sb8
- 2.Sa5#
- 1...Sd8
- 2.Sa5#
- 1...d2
- 2.Qc2#
- 1...e5
- 2.Qxf7#
- 1...f6
- 2.Bxe6#
- 1...Sxd4
- 1.Qg6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::S(D)
- R(a);N_GUARD,P_PINQ(C)::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);OGATE,XP(F)::R1(H),XS(g)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(b);OGATEB::QAB(C)
- P(h);N_GUARD::QAB1(C)
- P(i);N_GUARD::B(E),XP(h)
- Tries
- Try
- K(I);S_FLIGHT
- Vars
- S(g);OGATE,XP(F)::R1(H),XS(g)
- P(b);OGATEB::QAB(C)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(h);N_GUARD::QAB1(C)
- Refutation
- R(a);CHECK
- Try
- K(I);S_FLIGHT
- Vars
- S(g);OGATE,XP(F)::R1(H),XS(g)
- P(b);OGATEB::QAB(C)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(h);N_GUARD::QAB1(C)
- P(i);N_GUARD::B(E),XP(h)
- Refutation
- P(i);
- Try
- K(I);P-FLIGHT
- Vars
- S(g);OGATE,XP(F)::R1(H),XS(g)
- P(b);OGATEB::QAB(C)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(h);N_GUARD::QAB1(C)
- P(i);N_GUARD::B(E),XP(h)
- Refutation
- P(i);
- Try
- K(I);S_FLIGHT
- Vars
- S(g);OGATE,XP(F)::R1(H),XS(g)
- P(b);OGATEB::QAB(C)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(h);N_GUARD::QAB1(C)
- P(i);N_GUARD::B(E),XP(h)
- Refutation
- P(i);
- Try
- K(I);S_FLIGHT
- Vars
- S(g);OGATE,XP(F)::R1(H),XS(g)
- P(b);OGATEB::QAB(C)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(h);N_GUARD::QAB1(C)
- P(i);N_GUARD::B(E),XP(h)
- Refutation
- P(i);
- Try
- B(E);
- Vars
- S(g);OGATE,XP(F)::R1(H),XS(g)
- P(h);N_GUARD,XB(E)::QAB1(C)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD,P_PINQ(C)::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(b);OGATEB::QAB(C)
- P(h);N_GUARD::QAB1(C)
- P(i);N_GUARD::B(E),XP(h)
- Refutation
- P(e);
- Try
- R(H);
- Vars
- S(g);OGATE,XP(F)::R1(H),XS(g)
- P(b);OGATEB::QAB(C)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD,P_PINQ(C)::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(h);N_GUARD::QAB1(C)
- P(i);N_GUARD::B(E),XP(h)
- Refutation
- P(i);
- Try
- Q(C);P_PINP(b)
- Vars
- R(a);N_GUARD,N_SPINP(b),XQ(C)::S(D)
- S(g);OGATE,XP(F)::R1(H),XS(g)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(h);OGATEB::QAB(C),XP(i)
- P(i);N_GUARD::B(E),XP(h)
- Refutation
- P(i);
- Try
- Q(C);
- Vars
- P(i);N_GUARD::QAB(C),XP(h)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD::S(D),XR(a)
- P(h);N_GUARD::QAB1(C)
- Refutation
- R(a);CHECK
- Try
- Actual
- Q(C);
- Vars
- S(g);OGATE,XP(F)::R1(H),XS(g)
- P(i);N_GUARD,XQ(C)::B(E),XP(h)
- P(i);N_GUARD::QAB(C),XP(h)
- R(a);N_GUARD::S(D)
- R(a);N_GUARD,P_PINQ(C)::S(D)
- R(a);N_GUARD::S(D),XR(a)
- S(g);N_GUARD::S(D),XS(g)
- S(g);N_GUARD::S(D)
- P(b);OGATE::QAR2(C)
- P(h);OGATEB::QAB(C),XP(i)
- P(i);N_GUARD::B(E),XP(h)
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).