MESON Chess Problem Database
Problem Display
PID: 6197 (K7/5NQn/p1k2N2/BR3p2/2B5/2RP2b1/6b1/rq6 w - - 0 1)
Haglund, John Wilhelm
Vart Hem, 1927
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxd3
- 2.Bxd3#
- 1...Qxb5
- 2.Bd5#
- 1...Be1
- 2.Qxg2#
- 1...Bf2
- 2.Qxg2#
- 1...Bh2
- 2.Qxg2#
- 1...Bf4
- 2.Qxg2#
- 1...Bh4
- 2.Qxg2#
- 1...Be5
- 2.Qxg2#
- 1...Bd6
- 2.Sd8#
- 2.Qxg2#
- 1...Bc7
- 2.Qxg2#
- 1...Bb8
- 2.Qxg2#
- 1...axb5
- 2.Ba2#
- 2.Bb3#
- 2.Bd5#
- 2.Be6#
- 1...Qxd3
- Tries
- 1.Se5+?
- 1...Bxe5
- 2.Qd7#
- 1...Kd6+!
- 1...Bxe5
- 1.Sd6?
- threat
- 2.Qc7#
- 2.Qd7#
- 1...Qxb5
- 2.Qc7#
- 1...Rxa5
- 2.Qd7#
- 1...Bxd6
- 2.Qxg2#
- 2.Qb7#
- 2.Qd7#
- 1...Sxf6
- 2.Qc7#
- 1...axb5
- 2.Qc7#
- 1...Sf8
- 2.Qc7#
- 1...Kxd6+!
- threat
- 1.Rxb1?
- threat
- 2.Ba2#
- 2.Bb5#
- 2.Bd5#
- 2.Bxa6#
- 2.Be6#
- 1...Rxb1
- 2.Bxa6#
- 1...Rxa5
- 2.Bd5#
- 1...Sxf6
- 2.Be6#
- 1...Ra2
- 2.Bxa2#
- 2.Bb5#
- 2.Bd5#
- 2.Bxa6#
- 2.Be6#
- 1...Ra3
- 2.Bb5#
- 2.Bd5#
- 1...Ra4
- 2.Bb5#
- 2.Bd5#
- 1...Bd5
- 2.Bb5#
- 2.Bxd5#
- 1...Be1
- 2.Bb5#
- 2.Bd5#
- 1...Bf2
- 2.Bb5#
- 2.Bd5#
- 1...Be5
- 2.Bb5#
- 2.Bd5#
- 1...Bd6
- 2.Bb5#
- 2.Bd5#
- 1...Kc5+!
- threat
- 1.Rb4?
- threat
- 2.Ba2#
- 2.Bb3#
- 2.Bb5#
- 2.Bd5#
- 2.Bxa6#
- 2.Be6#
- 1...Kc5+
- 2.Bd5#
- 1...Qxd3
- 2.Bxd3#
- 2.Bb5#
- 2.Bd5#
- 1...Rxa5
- 2.Bd5#
- 1...Sxf6
- 2.Be6#
- 1...Qa2
- 2.Bxa2#
- 2.Bb3#
- 2.Bb5#
- 2.Bd5#
- 1...Qc2
- 2.Bb5#
- 2.Bd5#
- 1...Qc1
- 2.Bb5#
- 2.Bd5#
- 1...Qe1
- 2.Bb5#
- 2.Bd5#
- 1...Qg1
- 2.Bb5#
- 2.Bd5#
- 1...Qb2
- 2.Bb5#
- 2.Bd5#
- 1...Qb3
- 2.Bxb3#
- 2.Bb5#
- 2.Bd5#
- 1...Ra2
- 2.Bxa2#
- 2.Bb3#
- 2.Bb5#
- 2.Bd5#
- 2.Bxa6#
- 2.Be6#
- 1...Ra3
- 2.Bb3#
- 2.Bb5#
- 2.Bd5#
- 1...Bd5
- 2.Bb5#
- 2.Bxd5#
- 1...Be1
- 2.Bb5#
- 2.Bd5#
- 1...Bf2
- 2.Bb5#
- 2.Bd5#
- 1...Be5
- 2.Bb5#
- 2.Bd5#
- 1...Bd6
- 2.Bb5#
- 2.Bd5#
- 1...Qxb4!
- threat
- 1.Qxg3?
- threat
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 2.Qxg2#
- 1...Qxd3
- 2.Bxd3#
- 2.Qc7#
- 1...Qxb5
- 2.Bd5#
- 2.Qd6#
- 2.Qc7#
- 1...Rxa5
- 2.Sd8#
- 2.Qd6#
- 1...Sxf6
- 2.Qd6#
- 2.Qc7#
- 1...axb5
- 2.Ba2#
- 2.Bb3#
- 2.Bd5#
- 2.Be6#
- 2.Qd6#
- 2.Qc7#
- 1...Qa2
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Qc2
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Qd1
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Qe1
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Qf1
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Qg1
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Qh1
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Qb2
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Qb4
- 2.Sd8#
- 2.Qc7#
- 2.Qxg2#
- 1...Ra2
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Bf1
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 2.Qf3#
- 1...Bh1
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Bf3
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 2.Qxf3#
- 1...Bh3
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 2.Qf3#
- 1...Be4
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Bd5
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...Sg5
- 2.Sd8#
- 2.Qd6#
- 2.Qc7#
- 1...f4!
- threat
- 1.Se5+?
- Keys
- 1.Bc7!
- threat
- 2.Sd8#
- 1...Kxc7+
- 2.Bd5#
- 1...axb5+
- 2.Ba2#
- 1...Qxd3
- 2.Bxd3#
- 1...Qxb5
- 2.Bd5#
- 1...Bxc7
- 2.Qxg2#
- threat
- 1.Bc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(b);OGATE,XP(B)::R(A)+B(C),XQ(b)
- Q(b);SBLOCK,XR(E)::R(A)+B(C),DCHECK
- B(d);OGATE::QAB(H),XB(c)
- Tries
- Try
- S(G);CHECK
- Vars
- B(d);XS(G)::QAB1(H)
- Refutation
- K(g);CHECK,P-FLIGHT
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(b);XR(E)::QAR1(H)
- R(a);XB(D)::QAB1(H)
- S(h);XS(F)::QAR1(H)
- P(f);P_PINB(D),XR(E)::QAR1(H)
- S(h);::QAR1(H)
- Refutation
- K(g);CHECK,P-FLIGHT,XS(G)
- Try
- R(E);XQ(b)
- Threat
- DUALS(5)
- Vars
- R(a);XR(E)::R(A)+B(C),XP(f)
- R(a);XB(D)::R(A)+B(C),DCHECK
- S(h);XS(F)::R(A)+B(C)
- Refutation
- K(g);CHECK,P-FLIGHT
- Try
- R(E);
- Threat
- DUALS(6)
- Vars
- K(g);CHECK,P-FLIGHT::R(A)+B(C)
- R(a);XB(D)::R(A)+B(C),DCHECK
- S(h);XS(F)::R(A)+B(C)
- Refutation
- Q(b);XR(E)
- Try
- Q(H);XB(d)
- Threat
- DUALS(4)
- Refutation
- P(e);
- Try
- Actual
- B(D);
- Threat
- S(G)
- Vars
- K(g);CHECK,P-FLIGHT,XB(D)::R(A)+B(C)
- P(f);CHECK,SBLOCK,XR(E)::R(A)+B(C)
- Q(b);OGATE,XP(B)::R(A)+B(C),XQ(b)
- Q(b);SBLOCK,XR(E)::R(A)+B(C),DCHECK
- B(d);OGATE,SBLOCK,XB(D)::QAB(H),XB(c)
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).