MESON Chess Problem Database
Problem Display
PID: 230769 (5K2/2PRBR2/b7/1NpPkPpN/1q2r1p1/4P3/7r/1B5Q w - - 0 1)
van Dooren, Rene
The Problemist, 1988
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Qxe4#
- 1...Qd2
- 2.Qxe4#
- 1...Qa3
- 2.Qxe4#
- 1...Qc3
- 2.Qxe4#
- 1...Qa5
- 2.Qxe4#
- 1...Qb2
- 2.Qxe4#
- 1...Qb3
- 2.Qxe4#
- 1...Qxb5
- 2.Qxe4#
- 1...Rxe3
- 2.Bd6#
- 2.Bf6#
- 1...Rc4
- 2.Bd6#
- 2.Bf6#
- 1...Rd4
- 2.Bd6#
- 2.Bf6#
- 1...Rf4
- 2.Bd6#
- 2.Bf6#
- 1...c4
- 2.Qxe4#
- 1...Qe1
- Tries
- 1.Sd4?
- threat
- 2.Sc6#
- 2.Bf6#
- 2.Qxe4#
- 1...Qb8+
- 2.cxb8Q#
- 2.cxb8B#
- 1...Qxb1
- 2.Sc6#
- 2.Bf6#
- 1...Rxh1
- 2.Sc6#
- 2.Bf6#
- 1...Rxe3
- 2.Sc6#
- 2.Bf6#
- 1...Rxd4
- 2.Bd6#
- 2.Bf6#
- 1...cxd4
- 2.Qxe4#
- 1...Qa4
- 2.Bf6#
- 2.Qxe4#
- 1...Qb5
- 2.Bf6#
- 2.Qxe4#
- 1...Qb6
- 2.Qxe4#
- 1...Qb7
- 2.Bf6#
- 2.Qxe4#
- 1...Rc2
- 2.Sc6#
- 2.Bf6#
- 1...Rg2
- 2.Sc6#
- 2.Bf6#
- 1...Rf4
- 2.Sc6#
- 2.Bd6#
- 2.Bf6#
- 1...Bd3
- 2.Sc6#
- 2.Bf6#
- 1...Bb5
- 2.Bf6#
- 2.Qxe4#
- 1...Bb7
- 2.Bf6#
- 2.Qxe4#
- 1...c4
- 2.Sc6#
- 2.Qxe4#
- 1...Qxd4!
- threat
- 1.Sg3?
- threat
- 2.Bf6#
- 1...Rh8+
- 2.Qxh8#
- 1...Rxe3
- 2.Bd6#
- 1...c4
- 2.Qxe4#
- 1...Rh6!
- threat
- 1.Sf4?
- threat
- 2.Sd3#
- 2.Sg6#
- 2.Bd6#
- 1...Rh8+
- 2.Qxh8#
- 1...Qxb1
- 2.Sg6#
- 2.Bd6#
- 1...Qxb5
- 2.Sg6#
- 2.Bd6#
- 2.Qxe4#
- 1...Rxe3
- 2.Sg6#
- 2.Bd6#
- 1...Rxf4
- 2.Bd6#
- 2.Bf6#
- 1...Bxb5
- 2.Sg6#
- 2.Bd6#
- 1...Qd2
- 2.Sg6#
- 2.Bd6#
- 2.Qxe4#
- 1...Qa3
- 2.Sg6#
- 2.Bd6#
- 2.Qxe4#
- 1...Qc3
- 2.Sg6#
- 2.Bd6#
- 2.Qxe4#
- 1...Qb3
- 2.Sg6#
- 2.Bd6#
- 2.Qxe4#
- 1...Qc4
- 2.Sg6#
- 2.Bd6#
- 1...Qd4
- 2.Sg6#
- 2.Bd6#
- 1...Rd2
- 2.Sg6#
- 2.Bd6#
- 2.Qh8#
- 1...Rh6
- 2.Sd3#
- 1...Rd4
- 2.Sg6#
- 2.Bd6#
- 2.Bf6#
- 1...c4
- 2.Sg6#
- 2.Qxe4#
- 1...gxf4!
- threat
- 1.Qf3?
- threat
- 2.Bf6#
- 1...c4
- 2.Qxe4#
- 1...gxf3!
- threat
- 1.Qxh2+?
- 1...Rf4
- 2.Bf6#
- 1...g3!
- 1...Rf4
- 1.c8Q?
- threat
- 2.Qc7#
- 2.Qb8#
- 1...Qxb5
- 2.Qxe4#
- 2.Qc7#
- 1...Qa5
- 2.Qxe4#
- 1...c4
- 2.Qxe4#
- 1...Bxc8!
- threat
- 1.Sd4?
- Keys
- 1.Sc3!
- threat
- 2.Bd6#
- 1...Qb8+
- 2.cxb8Q#
- 2.cxb8B#
- 1...Qxc3
- 2.Qxe4#
- 1...Rxe3
- 2.Bf6#
- 1...Qb6
- 2.Qxe4#
- 1...c4
- 2.Qxe4#
- threat
- 1.Sc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(b);N_GUARD::QAR1(B),XR(c)
- Q(b);N_GUARD,XS(D)::QAR1(B),XR(c)
- P(e);P_PINB(J),S_CUTQ(b)::QAR1(B),XR(c)
- Tries
- Try
- S(D);
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK,OGATE::PXQ(b)=Q
- P(e);P_PINB(J),XS(D)::QAR1(B),XR(c)
- Q(b);::QAR1(B),XR(c)
- Refutation
- Q(b);XS(D)
- Try
- S(G);
- Threat
- B(J)
- Vars
- R(a);CHECK,OGATE::QAB(B),XR(a)
- R(c);XP(C)::B(J)
- P(e);P_PINB(J),S_CUTQ(b)::QAR1(B),XR(c)
- Refutation
- R(a);
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- R(a);CHECK,OGATE::QAB(B),XR(a)
- R(a);::S(G)
- Refutation
- P(g);XS(G)
- Try
- Q(B);
- Threat
- B(J)
- Vars
- P(e);P_PINB(J),S_CUTQ(b)::QAR1(B),XR(c)
- Refutation
- P(d);XQ(B)
- Try
- Q(B);CHECK,XR(a)
- Vars
- R(c);P_SPINR(c)::B(J)
- Refutation
- P(d);P_SPINP(d)
- Try
- P(H);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD::QAR1(B),XR(c)
- P(e);P_PINB(J),S_CUTQ(b)::QAR1(B),XR(c)
- Refutation
- B(h);XQ(H)
- Try
- Actual
- S(D);
- Threat
- B(J)
- Vars
- Q(b);CHECK,OGATE::PXQ(b)=Q
- Q(b);N_GUARD,XS(D)::QAR1(B),XR(c)
- R(c);XP(C)::B(J)
- Q(b);N_GUARD::QAR1(B),XR(c)
- P(e);P_PINB(J),S_CUTQ(b)::QAR1(B),XR(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).