MESON Chess Problem Database
Problem Display
PID: 267368 (1N3K2/1nBPPRpp/2r1k3/R5pq/3p4/b6N/3p1Q2/1b2r3 w - - 0 1)
Jansen, R
Schakend Nederland, 1979
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Sxg5#
- 1...Qe2
- 2.Sxg5#
- 1...Qf3
- 2.Sxg5#
- 1...Qxf7+
- 2.Qxf7#
- 1...Rec1
- 2.Re5#
- 1...Rd1
- 2.Re5#
- 1...Rf1
- 2.Re5#
- 1...Rg1
- 2.Re5#
- 1...Rh1
- 2.Re5#
- 1...Re4
- 2.Qf5#
- 1...Re5
- 2.Rxe5#
- 1...Rc2
- 2.Qf5#
- 1...Rd6
- 2.e8Q#
- 2.e8R#
- 1...Ba2
- 2.Qf5#
- 1...Be4
- 2.Re5#
- 1...Bf5
- 2.Qxf5#
- 1...Bc1
- 2.e8Q#
- 2.e8R#
- 1...Bb2
- 2.e8Q#
- 2.e8R#
- 1...Bxe7+
- 2.Rxe7#
- 1...Sd6
- 2.d8S#
- 1...d3
- 2.Qf5#
- 1...g4
- 2.Sf4#
- 1...g6
- 2.Rf6#
- 2.Qf6#
- 1...Qd1
- Tries
- 1.Qe3+?
- 1...Be4
- 2.Re5#
- 1...dxe3
- 2.Re5#
- 1...Rxe3!
- 1...Be4
- 1.Qe2+?
- 1...Qxe2
- 2.Sxg5#
- 1...Be4
- 2.Re5#
- 1...Rxe2!
- 1...Qxe2
- 1.d8Q?
- threat
- 2.Qd5#
- 2.Qd7#
- 2.Qc8#
- 1...Qxf7+
- 2.Qxf7#
- 1...Bxe7+
- 2.Rxe7#
- 2.Qxe7#
- 1...Rxc7
- 2.Qd5#
- 1...Sxa5
- 2.Qd7#
- 1...Qf3
- 2.Sxg5#
- 2.Qd7#
- 2.Qc8#
- 1...Re5
- 2.Rxe5#
- 2.Qd7#
- 2.Qc8#
- 1...Rc5
- 2.Qd7#
- 2.e8Q#
- 2.e8R#
- 1...Rd6
- 2.e8Q#
- 2.e8R#
- 1...Ba2
- 2.Qf5#
- 2.Qd7#
- 2.Qc8#
- 1...Be4
- 2.Re5#
- 2.Qd7#
- 2.Qc8#
- 1...Bc5
- 2.Qd7#
- 1...Bd6
- 2.Qd7#
- 2.Qc8#
- 1...Sc5
- 2.e8Q#
- 2.e8R#
- 1...Sd6
- 2.Qd7#
- 1...g4
- 2.Sf4#
- 2.Qd7#
- 2.Qc8#
- 1...Sxd8!
- threat
- 1.Qe3+?
- Keys
- 1.Qf3!
- threat
- 2.Qd5#
- 1...Qxf7+
- 2.Qxf7#
- 1...Bxe7+
- 2.Rxe7#
- 1...Qxf3
- 2.Sxg5#
- 1...Sxa5
- 2.d8S#
- 1...Re4
- 2.Qf5#
- 1...Re5
- 2.Rxe5#
- 1...Rc5
- 2.e8Q#
- 2.e8R#
- 1...Rd6
- 2.e8Q#
- 2.e8R#
- 1...Ba2
- 2.Qf5#
- 1...Be4
- 2.Re5#
- 1...Bc5
- 2.Qb3#
- 1...Sc5
- 2.Qxc6#
- 2.d8S#
- 2.e8Q#
- 2.e8R#
- 1...g4
- 2.Sf4#
- threat
- 1.Qf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 11
- Sets
- Q(g);N_GUARD::S(B),XP(f)
- Q(g);N_GUARD,P_PINR(G)::S(B),XP(f)
- Q(g);CHECK,OGATE,XR(G)::QAB1(A),XQ(g)
- R(b);N_GUARD::R1(C)
- R(b);S_CUTB(a)::QAB1(A)
- R(b);N_GUARD::R1(C),XR(b)
- R(h);S_CUTB(a)::QAB1(A)
- R(h);N_PINP(F)::P=Q
- B(a);N_GUARD::QAB1(A)
- B(a);S_CUTR(b)::R1(C)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(d);N_PINP(F)::P=Q
- B(d);CHECK,OGATE,XP(F)::R1(G),XB(d)
- S(j);N_GUARD,N_PINP(F)::P=S
- P(e);S_CUTB(a)::QAB1(A)
- P(f);N_GUARD::S(B)
- Tries
- Try
- Q(A);CHECK
- Vars
- B(a);P_SPINB(a)::R1(C)
- P(e);XQ(A)::R1(C)
- Refutation
- R(b);XQ(A)
- Try
- Q(A);CHECK
- Vars
- Q(g);XQ(A)::S(B),XP(f)
- B(a);P_SPINB(a)::R1(C)
- Refutation
- R(b);XQ(A)
- Try
- P(E);
- Threat
- DUALS(3)
- Vars
- Q(g);CHECK,OGATE,XR(G)::QAB1(A),XQ(g)
- R(h);XB(D)::QAB1(E)
- S(j);XR(C)::QAB1(E)
- R(h);N_PINP(F)::P=Q
- B(d);::QAB1(E)
- S(j);N_PINP(F)::P=Q
- S(j);N_PINP(F)::QAB1(E)
- Refutation
- S(j);XQ(E)
- Try
- Actual
- Q(A);
- Threat
- QAB1(A)
- Vars
- Q(g);CHECK,OGATE,XR(G)::QAB1(A),XQ(g)
- B(d);CHECK,OGATE,XP(F)::R1(G),XB(d)
- Q(g);N_GUARD,P_PINR(G),XQ(A)::S(B),XP(f)
- S(j);N_GUARD,XR(C)::P=S
- R(b);S_CUTB(a)::QAB1(A)
- R(b);N_GUARD::R1(C),XR(b)
- R(h);N_PINP(F)::P=Q
- B(a);N_GUARD::QAB1(A)
- B(a);S_CUTR(b)::R1(C)
- B(d);S_CUTR(h)::QAB(A)
- P(f);N_GUARD::S(B)
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).