MESON Chess Problem Database
Problem Display
PID: 199410 (2N1B1bB/7n/1p2k2K/3p3N/5PP1/p2pb3/6Q1/8 w - - 0 1)
van der Werf, JD
3rd HM., Op de Hoogte, 1909
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Bg1
- 2.f5#
- 1...Bf2
- 2.f5#
- 1...Bd4
- 2.f5#
- 1...Bxf4+
- 2.Sxf4#
- 1...Bc5
- 2.f5#
- 1...Sg5
- 2.f5#
- 1...Sf6
- 2.Sg7#
- 1...d4
- 2.Qe4#
- 2.Qc6#
- 2.Qa2#
- 1...Bg1
- Tries
- 1.Ba1?
- threat
- 2.Sg7#
- 1...Bxf4+
- 2.Sxf4#
- 1...d4
- 2.Qe4#
- 2.Qc6#
- 2.Qa2#
- 1...Bd4!
- threat
- 1.Bc3?
- threat
- 2.Sg7#
- 1...Bxf4+
- 2.Sxf4#
- 1...d4
- 2.Qe4#
- 2.Qc6#
- 2.Qa2#
- 1...Bd4!
- threat
- 1.Bd4?
- threat
- 2.Sg7#
- 1...Bxf4+
- 2.Sxf4#
- 1...Bxd4!
- threat
- 1.Qh3?
- threat
- 2.Qxe3#
- 2.g5#
- 1...Bxf4+
- 2.Sxf4#
- 2.g5#
- 1...Bc1
- 2.g5#
- 1...Bg1
- 2.f5#
- 2.g5#
- 1...Bd2
- 2.g5#
- 1...Bf2
- 2.f5#
- 2.g5#
- 1...Bd4
- 2.f5#
- 2.g5#
- 1...Bc5
- 2.f5#
- 2.g5#
- 1...Sg5
- 2.f5#
- 1...Sf6
- 2.Sg7#
- 1...d4!
- threat
- 1.Qg1?
- threat
- 2.Qxe3#
- 1...Bxf4+
- 2.Sxf4#
- 1...Bxg1
- 2.f5#
- 1...Bc1
- 2.Qxb6#
- 1...Bd2
- 2.Qxb6#
- 1...Bf2
- 2.f5#
- 1...Bd4
- 2.f5#
- 1...Bc5
- 2.f5#
- 1...Sg5
- 2.f5#
- 1...Sf6
- 2.Sg7#
- 1...d4!
- threat
- 1.Qb2?
- threat
- 2.Sg7#
- 2.Qe5#
- 1...Bxf4+
- 2.Sxf4#
- 1...d4
- 2.Qa2#
- 2.Qb3#
- 1...Bd4
- 2.f5#
- 1...axb2!
- threat
- 1.Qc2?
- threat
- 2.Qc6#
- 1...Bxf4+
- 2.Sxf4#
- 1...Bc5
- 2.f5#
- 1...dxc2!
- threat
- 1.Qd2?
- threat
- 2.Qxe3#
- 1...Bxf4+
- 2.Sxf4#
- 1...d4
- 2.Qa2#
- 1...Bg1
- 2.f5#
- 1...Bf2
- 2.f5#
- 1...Bd4
- 2.f5#
- 1...Bc5
- 2.f5#
- 1...Sg5
- 2.f5#
- 1...Sf6
- 2.Sg7#
- 1...Bxd2!
- threat
- 1.Qe2?
- threat
- 2.Qxe3#
- 1...d4
- 2.Qa2#
- 1...Sg5
- 2.f5#
- 1...Sf6
- 2.Sg7#
- 1...dxe2!
- threat
- 1.g5?
- threat
- 2.Sg7#
- 2.Qh3#
- 2.Qg4#
- 1...Bxf4
- 2.Qh3#
- 2.Qg4#
- 1...Sxg5
- 2.Qg4#
- 1...Bd4
- 2.Qh3#
- 2.Qg4#
- 1...Sf6
- 2.Sg7#
- 1...d4
- 2.Sg7#
- 2.Qe4#
- 1...Kf5!
- threat
- 1.Ba1?
- Keys
- 1.Qf2!
- threat
- 2.Qxe3#
- 1...Bxf4+
- 2.Sxf4#
- 1...Bxf2
- 2.f5#
- 1...d4
- 2.Qa2#
- 1...Bc1
- 2.Qxb6#
- 1...Bd2
- 2.Qxb6#
- 1...Bd4
- 2.f5#
- 1...Bc5
- 2.f5#
- 1...Sg5
- 2.f5#
- 1...Sf6
- 2.Sg7#
- threat
- 1.Qf2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- B(c);N_PINP(B)::P(B)
- B(c);CHECK,XP(B)::S(D),XB(c)
- S(g);N_PINP(B)::P(B)
- S(g);SBLOCK::S(D)
- Tries
- Try
- B(H);
- Threat
- S(D)
- Vars
- B(c);CHECK,XP(B)::S(D),XB(c)
- Refutation
- B(c);N_PINP(B)
- Try
- B(H);
- Threat
- S(D)
- Vars
- B(c);CHECK,XP(B)::S(D),XB(c)
- Refutation
- B(c);N_PINP(B)
- Try
- B(H);
- Threat
- S(D)
- Vars
- B(c);CHECK,XP(B)::S(D),XB(c)
- Refutation
- B(c);N_PINP(B),XB(H)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(c);::QAB(A)+P(C)
- S(g);N_PINP(B)::P(B)
- S(g);SBLOCK::S(D)
- Refutation
- P(d);
- Try
- Q(A);
- Threat
- QAR(A),XB(c)
- Vars
- B(c);CHECK,XP(B)::S(D),XB(c)
- B(c);N_PINP(B),XQ(A)::P(B)
- B(c);OGATE::QAR(A),XP(e)
- B(c);N_PINP(B)::P(B)
- S(g);N_PINP(B)::P(B)
- S(g);SBLOCK::S(D)
- Refutation
- P(d);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(c);CHECK,XP(B)::S(D),XB(c)
- B(c);N_PINP(B)::P(B)
- Refutation
- P(a);XQ(A)
- Try
- Q(A);
- Threat
- QAR2(A)
- Vars
- B(c);CHECK,XP(B)::S(D),XB(c)
- B(c);N_PINP(B)::P(B)
- Refutation
- P(b);XQ(A)
- Try
- Q(A);
- Threat
- QAR(A),XB(c)
- Vars
- B(c);CHECK,XP(B)::S(D),XB(c)
- P(d);OGATEB::QAB(A)
- B(c);N_PINP(B)::P(B)
- S(g);N_PINP(B)::P(B)
- S(g);SBLOCK::S(D)
- Refutation
- B(c);XQ(A)
- Try
- Q(A);P_PINB(c)
- Threat
- QAR(A),XB(c)
- Vars
- P(d);OGATEB::QAB(A)
- S(g);N_PINP(B)::P(B)
- S(g);SBLOCK::S(D)
- Refutation
- P(b);N_SPINB(c),XQ(A)
- Try
- P(C);N_SPINP(B)
- Threat
- DUALS(3)
- Vars
- S(g);XP(C)::QAB(A)
- S(g);::S(D)
- Refutation
- K(f);S_FLIGHT
- Try
- Actual
- Q(A);
- Threat
- QAR(A),XB(c)
- Vars
- B(c);CHECK,XP(B)::S(D),XB(c)
- B(c);N_PINP(B),XQ(A)::P(B)
- P(d);OGATEB::QAB(A)
- B(c);OGATE::QAR(A),XP(e)
- B(c);N_PINP(B)::P(B)
- S(g);N_PINP(B)::P(B)
- S(g);SBLOCK::S(D)
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).