MESON Chess Problem Database
Problem Display
PID: 273328 (3n2n1/2B1Q3/8/4rk1K/2PbN1p1/5b2/2B5/4RR2 w - - 0 1)
van der Harst, G
Schakend Nederland, 1970
#2
8 + 7
| 15601 | Albrecht-Leiss-Degener Collection | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Kf4+
- 2.Qg5#
- 1...Rxe4
- 2.Bxe4#
- 1...Ra5
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 1...Rb5
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 1...Rc5
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sf6#
- 1...Rd5
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sf6#
- 1...Re6
- 2.Sg3#
- 2.Qg5#
- 1...Bg1
- 2.Qxe5#
- 1...Bf2
- 2.Qxe5#
- 1...Be3
- 2.Qxe5#
- 1...Bc5
- 2.Qxe5#
- 1...Bb6
- 2.Qxe5#
- 1...Ba7
- 2.Qxe5#
- 1...Sf6+
- 2.Qxf6#
- 1...Sh6
- 2.Qf6#
- 1...g3+
- 2.Rxf3#
- 1...Kf4+
- Tries
- 1.Sd2+?
- 1...Re4
- 2.Bxe4#
- 1...Kf4+!
- 1...Re4
- 1.Sc3+?
- 1...Re4
- 2.Bxe4#
- 1...Kf4+!
- 1...Re4
- 1.Sc5+?
- 1...Re4
- 2.Bxe4#
- 2.Qg5#
- 1...Kf4+!
- 1...Re4
- 1.Sg5+?
- 1...Re4
- 2.Bxe4#
- 1...Kf4!
- 1...Re4
- 1.Sf6+?
- 1...Re4
- 2.Bxe4#
- 1...Kf4+!
- 1...Re4
- 1.Bxe5?
- threat
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Sf6+
- 2.Sxf6#
- 2.Qxf6#
- 1...g3+
- 2.Rxf3#
- 1...Sxe7
- 2.Sc5#
- 2.Sg5#
- 1...Bf2
- 2.Sg3#
- 2.Sd6#
- 1...Bc3
- 2.Sd2#
- 2.Sxc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Bc5
- 2.Sd2#
- 2.Sc3#
- 2.Sg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Bxe5!
- threat
- 1.Qf7+?
- 1...Sf6+
- 2.Qxf6#
- 1...Sxf7!
- 1...Sf6+
- 1.Sd2+?
- Keys
- 1.Qg7!
- threat
- 2.Qxg4#
- 1...Kf4+
- 2.Qg5#
- 1...Ke6+
- 2.Sg5#
- 1...Sf6+
- 2.Qxf6#
- 1...g3+
- 2.Qg4#
- 1...Rxe4
- 2.Qg6#
- 1...Bf2
- 2.Qxe5#
- 1...Sh6
- 2.Qf6#
- threat
- 1.Qg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- K(e);CHECK,N_GUARD,P-FLIGHT,P_SPINR(d)::QAB1(H)
- R(d);OGATE,P_SPINR(d),XS(E)::B(C),XR(d)
- B(b);N_GUARD::QAR1(H),XR(d)
- B(b);N_GUARD,N_SPINB(a)::QAR1(H),XR(d)
- S(g);CHECK,N_GUARD::QAR1(H),XS(g)
- S(g);N_GUARD::QAR1(H)
- P(c);CHECK,N_GUARD::R(B),XB(a)
- Tries
- Try
- S(E);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::B(C),XR(d)
- Refutation
- K(e);CHECK,P-FLIGHT,P_SPINR(d)
- Try
- S(E);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::B(C),XR(d)
- Refutation
- K(e);CHECK,P-FLIGHT,P_SPINR(d)
- Try
- S(E);CHECK
- Refutation
- K(e);CHECK,P-FLIGHT,P_SPINR(d)
- Try
- S(E);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::B(C),XR(d)
- Refutation
- K(e);P-FLIGHT,P_PINS(E),P_SPINR(d)
- Try
- S(E);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::B(C),XR(d)
- Refutation
- K(e);CHECK,P-FLIGHT,P_SPINR(d)
- Try
- B(G);XR(d)
- Threat
- DUALS(7)
- Vars
- P(c);CHECK,N_GUARD::R(B),XB(a)
- Refutation
- B(b);XB(G)
- Try
- Q(H);CHECK
- Vars
- S(g);CHECK,N_GUARD,P_SPINS(g)::QAR1(H),XS(g)
- Refutation
- S(f);XQ(H)
- Try
- Actual
- Q(H);
- Threat
- QAB1(H),XP(c)
- Vars
- K(e);CHECK,N_GUARD,P-FLIGHT,P_SPINR(d)::QAB1(H)
- K(e);CHECK,N_GUARD,N_SPINB(a),S_CUTR(d),S_FLIGHT::S(E)
- S(g);CHECK,N_GUARD::QAR1(H),XS(g)
- P(c);CHECK::QAB1(H)
- R(d);P_SPINR(d),XS(E)::QAB1(H)
- B(b);N_GUARD,N_SPINB(a)::QAR1(H),XR(d)
- S(g);N_GUARD::QAR1(H)
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).