MESON Chess Problem Database
Problem Display
PID: 222793 (3r1B2/1B6/1N1P1pP1/n1P1k1P1/5N2/p1p1P1n1/P1Q5/1K6 w - - 0 1)
Barrier, ?
St. Louis Globe Democrat, 1884
#2
12 + 7
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxd6
- 2.Bxd6#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Rxf8
- 2.Sd7#
- 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...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sxb7
- 2.Sc4#
- 1...fxg5
- 2.Bg7#
- 1...f5
- 2.Bg7#
- 2.Qxc3#
- 1...Rxd6
- Tries
- 1.Ka1?
- 1...Rxd6
- 2.Bxd6#
- 1...Rxf8
- 2.Sd7#
- 1...Sxb7
- 2.Sc4#
- 1...fxg5
- 2.Bg7#
- 1...Se4
- 2.Qxe4#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...f5
- 2.Bg7#
- 2.Qxc3#
- 1...Sb3+!
- 1...Rxd6
- 1.Bg2?
- 1...Rxd6
- 2.Bxd6#
- 1...Rxf8
- 2.Sd7#
- 1...fxg5
- 2.Bg7#
- 1...Se4
- 2.Qxe4#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...f5
- 2.Bg7#
- 2.Qxc3#
- 1...Rb8!
- 1...Rxd6
- 1.Bf3?
- 1...Rxd6
- 2.Bxd6#
- 1...Rxf8
- 2.Sd7#
- 1...fxg5
- 2.Bg7#
- 1...Se4
- 2.Qxe4#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...f5
- 2.Bg7#
- 2.Qxc3#
- 1...Rb8!
- 1...Rxd6
- 1.Bd5?
- 1...Rxd6
- 2.Bxd6#
- 1...Rxf8
- 2.Sd7#
- 1...fxg5
- 2.Bg7#
- 1...Se4
- 2.Qxe4#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sf5
- 2.Sd3#
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...f5
- 2.Sd3#
- 2.Bg7#
- 2.Qxc3#
- 1...Rb8!
- 1...Rxd6
- 1.Bc6?
- 1...Rxd6
- 2.Bxd6#
- 1...Rxf8
- 2.Sd7#
- 1...Sxc6
- 2.Sc4#
- 1...fxg5
- 2.Bg7#
- 1...Se4
- 2.Qxe4#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sb7
- 2.Sc4#
- 1...f5
- 2.Bg7#
- 2.Qxc3#
- 1...Rb8!
- 1...Rxd6
- 1.Ba8?
- 1...Rxd6
- 2.Bxd6#
- 1...Rxa8
- 2.Sd7#
- 1...Rxf8
- 2.Sd7#
- 1...fxg5
- 2.Bg7#
- 1...Se4
- 2.Qxe4#
- 1...Rd7
- 2.Sxd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...f5
- 2.Bg7#
- 2.Qxc3#
- 1...Rb8!
- 1...Rxd6
- 1.Bh6?
- 1...Sxb7
- 2.Sc4#
- 1...fxg5
- 2.Bg7#
- 1...Se4
- 2.Qxe4#
- 1...Rb8
- 2.Sd7#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Rf8
- 2.Sd7#
- 1...Rg8
- 2.Sd7#
- 1...Rh8
- 2.Sd7#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...f5
- 2.Bg7#
- 2.Qxc3#
- 1...Rxd6!
- 1...Sxb7
- 1.Be7?
- threat
- 2.Bxf6#
- 1...Rxd6
- 2.Bxd6#
- 1...Se4
- 2.Qxe4#
- 1...Rf8
- 2.Sd7#
- 1...Sh5
- 2.Qe4#
- 1...f5
- 2.Bf6#
- 2.Qxc3#
- 1...fxg5!
- threat
- 1.Bg7?
- threat
- 2.Bxf6#
- 1...Se4
- 2.Qxe4#
- 1...Rf8
- 2.Sd7#
- 1...Sh5
- 2.Qe4#
- 1...Rxd6!
- threat
- 1.Qd3?
- threat
- 2.Qd5#
- 1...Rxd6
- 2.Bxd6#
- 1...fxg5
- 2.Bg7#
- 1...c2+!
- threat
- 1.d7?
- threat
- 2.Bd6#
- 1...Rxd7
- 2.Sxd7#
- 1...Sxb7
- 2.Sc4#
- 1...fxg5
- 2.Bg7#
- 1...Se4
- 2.Qxe4#
- 1...Sf5
- 2.Qe4#
- 1...Sc4
- 2.Sxc4#
- 1...Rxf8!
- threat
- 1.g7?
- 1...Rxd6
- 2.Bxd6#
- 1...Rxf8
- 2.Sd7#
- 1...Sxb7
- 2.Sc4#
- 1...Se4
- 2.Qxe4#
- 1...Rb8
- 2.Sd7#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Sf1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Se2
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Sh5
- 2.Qe4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...f5
- 2.Qxc3#
- 1...fxg5!
- 1...Rxd6
- 1.Ka1?
- Keys
- 1.Bc8!
- 1...Rxd6
- 2.Bxd6#
- 1...Rxc8
- 2.Sd7#
- 1...Rxf8
- 2.Sd7#
- 1...fxg5
- 2.Bg7#
- 1...Rd7
- 2.Sxd7#
- 1...Re8
- 2.Sd7#
- 1...Sf1
- 2.Qf5#
- 1...Sh1
- 2.Qf5#
- 1...Se2
- 2.Qf5#
- 1...Se4
- 2.Sd3#
- 1...Sf5
- 2.Qxf5#
- 1...Sh5
- 2.Qf5#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...f5
- 2.Bg7#
- 1...Rxd6
- 1.Bc8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD::S(H),XR(g)
- R(g);N_GUARD::S(H)
- R(g);N_GUARD,XB(L)::S(H)
- S(c);N_GUARD::QAR1(C)
- S(c);N_GUARD::QAR1(C),XS(c)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- S(d);N_GUARD,XB(K)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD,XB(L)::S(H)
- S(d);N_GUARD,XB(K)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H),XR(g)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H),XS(d)
- S(d);N_GUARD::S(H)
- Refutation
- S(d);CHECK
- Try
- B(K);
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD,XB(L)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H),XR(g)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- Refutation
- R(g);P_PINS(H)
- Try
- B(K);
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD,XB(L)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H),XR(g)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- Refutation
- R(g);P_PINS(H)
- Try
- B(K);
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD,XB(L)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H),XR(g)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- Refutation
- R(g);P_PINS(H)
- Try
- B(K);
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD,XB(L)::S(H)
- S(d);N_GUARD,XB(K)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H),XR(g)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- Refutation
- R(g);P_PINS(H)
- Try
- B(K);
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD,XB(K)::S(H)
- R(g);N_GUARD,XB(L)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H),XR(g)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- Refutation
- R(g);P_PINS(H)
- Try
- B(L);
- Vars
- S(d);N_GUARD,XB(K)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H)
- R(g);N_GUARD::S(H),XR(g)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- Refutation
- R(g);XP(I)
- Try
- B(L);
- Threat
- B(L),XP(f)
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- Refutation
- P(f);XP(G)
- Try
- B(L);P_PINP(f)
- Threat
- B(L),XP(f)
- Vars
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- Refutation
- R(g);XP(I)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- P(f);OGATEB,XP(G)::B(L)
- Refutation
- P(b);CHECK
- Try
- P(I);
- Threat
- B(L)
- Vars
- R(g);XP(I)::S(H),XR(g)
- S(d);N_GUARD,XB(K)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- S(c);N_GUARD::QAR1(C),XS(c)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H),XS(d)
- Refutation
- R(g);XB(L)
- Try
- P(J);
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD,XB(L)::S(H)
- S(d);N_GUARD,XB(K)::S(H)
- S(c);N_GUARD::QAR1(C),XS(c)
- R(g);N_GUARD::S(H)
- R(g);N_GUARD::S(H),XR(g)
- S(c);N_GUARD::QAR1(C)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- P(f);SBLOCK::QAB(C),XP(b)
- Refutation
- P(f);XP(G)
- Try
- Actual
- B(K);
- Vars
- R(g);OGATE,XP(I)::B(L),XR(g)
- R(g);N_GUARD,XB(K)::S(H)
- R(g);N_GUARD,XB(L)::S(H)
- P(f);OGATEB,XP(G)::B(L)
- R(g);N_GUARD::S(H),XR(g)
- R(g);N_GUARD::S(H)
- S(c);N_GUARD::QAR1(C)
- S(c);SBLOCK::S(E)
- S(c);N_GUARD::QAR1(C),XS(c)
- S(d);N_GUARD::S(H)
- S(d);N_GUARD::S(H),XS(d)
- P(f);OGATEB::B(L)
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).