MESON Chess Problem Database
Problem Display
PID: 63478 (4Q3/1pN2p2/7n/1Pp2pp1/bpk3Pb/2p1P2r/P3K1PP/5B2 w - - 0 1)
Johnston, TS
Chess Amateur (The), 1909
#2
10 + 12
SOLUTION
- SOUND
- Sets
- 1...Rxh2
- 2.Kf3#
- 1...Rxe3+
- 2.Kxe3#
- 1...Rf3
- 2.Kxf3#
- 1...Rg3
- 2.Ke1#
- 2.Kf2#
- 1...Bd1+
- 2.Kxd1#
- 1...Bxb5
- 2.Kd1#
- 2.Qxb5#
- 1...Be1
- 2.Kxe1#
- 1...Bf2
- 2.Kxf2#
- 1...Bg3
- 2.Kf3#
- 1...Sxg4
- 2.Qxf7#
- 1...Sg8
- 2.Qxf7#
- 1...c2
- 2.Kd2#
- 1...fxg4
- 2.Qe4#
- 1...f4
- 2.Qe4#
- 1...f6
- 2.Qe6#
- 1...Rxh2
- Tries
- 1.Qd7?
- threat
- 2.Qd3#
- 2.Qd5#
- 1...Rxe3+
- 2.Kxe3#
- 1...Bd1+
- 2.Kxd1#
- 1...c2
- 2.Kd2#
- 2.Qd3#
- 1...Bc2
- 2.Qd5#
- 1...b3!
- threat
- 1.Qe5?
- threat
- 2.Qd5#
- 1...Rxe3+
- 2.Kxe3#
- 1...Bd1+
- 2.Kxd1#
- 1...c2
- 2.Kd2#
- 1...b3!
- threat
- 1.Qd8?
- threat
- 2.Qd3#
- 2.Qd5#
- 1...Rxe3+
- 2.Kxe3#
- 1...Bd1+
- 2.Kxd1#
- 1...c2
- 2.Kd2#
- 2.Qd3#
- 1...Bc2
- 2.Qd5#
- 1...b3!
- threat
- 1.gxf5?
- threat
- 2.Qe4#
- 1...Rxe3+
- 2.Kxe3#
- 1...Bd1+
- 2.Kxd1#
- 1...Sxf5
- 2.Qxf7#
- 1...c2
- 2.Kd2#
- 1...Bc2!
- threat
- 1.Qd7?
- Keys
- 1.b6!
- 1...Rxe3+
- 2.Kxe3#
- 1...Bd1+
- 2.Kxd1#
- 1...Rxh2
- 2.Kf3#
- 1...Bxe8
- 2.Kd1#
- 1...Sxg4
- 2.Qxf7#
- 1...fxg4
- 2.Qe4#
- 1...c2
- 2.Kd2#
- 1...b3
- 2.Qxa4#
- 1...Bc2
- 2.Qb5#
- 1...Rf3
- 2.Kxf3#
- 1...Rg3
- 2.Ke1#
- 2.Kf2#
- 1...Bb3
- 2.Qb5#
- 1...Bb5
- 2.Kd1#
- 2.Qxb5#
- 1...Bc6
- 2.Kd1#
- 1...Bd7
- 2.Kd1#
- 1...Be1
- 2.Kxe1#
- 1...Bf2
- 2.Kxf2#
- 1...Bg3
- 2.Kf3#
- 1...Sg8
- 2.Qxf7#
- 1...f4
- 2.Qe4#
- 1...f6
- 2.Qe6#
- 1...Rxe3+
- 1.b6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- R(b);P_PINP(D),XP(E)::B(A)+K(C)
- R(b);CHECK,XP(F)::B(A)+K(C),XR(b)
- R(b);::B(A)+K(C),XR(b)
- B(c);CHECK::B(A)+K(C),XB(c)
- B(f);::B(A)+K(C),XB(f)
- B(f);::B(A)+K(C)
- S(j);N_GUARD,XP(G)::QAB(J),XP(l)
- S(j);N_GUARD::QAB(J),XP(l)
- P(a);::B(A)+K(C)
- P(h);N_GUARD,XP(G)::QAR2(J)
- P(h);N_GUARD::QAR2(J)
- P(l);N_GUARD::QAB(J)
- Tries
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,XP(F)::B(A)+K(C),XR(b)
- B(c);CHECK::B(A)+K(C),XB(c)
- B(c);::QAB1(J)
- Refutation
- P(d);
- Try
- Q(J);
- Threat
- QAB1(J)
- Vars
- R(b);CHECK,XP(F)::B(A)+K(C),XR(b)
- B(c);CHECK::B(A)+K(C),XB(c)
- P(a);::B(A)+K(C)
- Refutation
- P(d);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,XP(F)::B(A)+K(C),XR(b)
- B(c);CHECK::B(A)+K(C),XB(c)
- B(c);::QAB1(J)
- Refutation
- P(d);
- Try
- P(G);XP(h)
- Threat
- QAR2(J)
- Vars
- R(b);CHECK,XP(F)::B(A)+K(C),XR(b)
- B(c);CHECK::B(A)+K(C),XB(c)
- S(j);N_GUARD,XP(G)::QAB(J),XP(l)
- P(a);::B(A)+K(C)
- Refutation
- B(c);
- Try
- Actual
- P(H);
- Vars
- R(b);CHECK,XP(F)::B(A)+K(C),XR(b)
- B(c);CHECK::B(A)+K(C),XB(c)
- R(b);P_PINP(D),XP(E)::B(A)+K(C)
- B(c);XQ(J)::B(A)+K(C)
- S(j);N_GUARD,XP(G)::QAB(J),XP(l)
- P(h);N_GUARD,XP(G)::QAR2(J)
- P(a);::B(A)+K(C)
- P(d);OGATEB::QAR2(J),XB(c)
- B(c);N_GUARD::QAB1(J)
- R(b);::B(A)+K(C),XR(b)
- B(c);::B(A)+K(C)
- B(f);::B(A)+K(C),XB(f)
- B(f);::B(A)+K(C)
- S(j);N_GUARD::QAB(J),XP(l)
- P(h);N_GUARD::QAR2(J)
- P(l);N_GUARD::QAB(J)
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).