MESON Chess Problem Database
Problem Display
PID: 216567 (3RB3/2N2Ppr/p5Kp/n3pp2/3Pk1PQ/3pB1Pb/3PqP2/4R1N1 w - - 0 1)
Segers, Marcel
Deutsche Schachzeitung, 1990
#2
14 + 11
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxg4+
- 2.Bg5#
- 1...Qxe1
- 2.f3#
- 1...Qxd2
- 2.Bxd2#
- 2.f3#
- 1...Qxf2
- 2.Bxf2#
- 1...Qxe3
- 2.Rxe3#
- 2.f3#
- 1...Sb3
- 2.Bc6#
- 1...Sc4
- 2.Bc6#
- 1...Sc6
- 2.Bxc6#
- 1...Sb7
- 2.Bc6#
- 1...exd4
- 2.Qe7#
- 1...Qxg4+
- Tries
- 1.Sb5?
- threat
- 2.Sc3#
- 1...Qxg4+
- 2.Bg5#
- 1...Qxd2
- 2.Bxd2#
- 2.f3#
- 1...exd4
- 2.Qe7#
- 1...axb5!
- threat
- 1.Sd5?
- threat
- 2.Sc3#
- 1...Qxd2
- 2.f3#
- 1...exd4
- 2.Qe7#
- 1...Qxg4+!
- threat
- 1.Se6?
- threat
- 2.Sc5#
- 1...Qxg4+
- 2.Bg5#
- 1...Sb3
- 2.Bc6#
- 1...Sb7
- 2.Bc6#
- 1...exd4!
- threat
- 1.Bg5?
- threat
- 2.f3#
- 1...Bg2
- 2.gxf5#
- 1...exd4!
- threat
- 1.Bxh6?
- threat
- 2.f3#
- 1...exd4
- 2.Qe7#
- 1...Bg2
- 2.gxf5#
- 1...Rxh6+!
- threat
- 1.Rxe2?
- threat
- 2.f3#
- 1...exd4
- 2.Qe7#
- 1...Bg2
- 2.gxf5#
- 1...dxe2!
- threat
- 1.Qe7?
- threat
- 2.Qxe5#
- 1...Sc4
- 2.Bc6#
- 1...Sc6
- 2.Bxc6#
- 1...Qxg4+!
- threat
- 1.gxf5+?
- 1...Qg4+
- 2.Bg5#
- 1...Bg4!
- 1...Qg4+
- 1.f8Q?
- threat
- 2.Qxf5#
- 1...Qxg4+
- 2.Bg5#
- 1...Qxf2
- 2.Bxf2#
- 1...fxg4
- 2.Qf5#
- 1...f4
- 2.Qf5#
- 1...Qf3!
- threat
- 1.Sb5?
- Keys
- 1.Sxa6!
- threat
- 2.Sc5#
- 1...Qxg4+
- 2.Bg5#
- 1...exd4
- 2.Qe7#
- 1...Sb3
- 2.Bc6#
- 1...Sb7
- 2.Bc6#
- threat
- 1.Sxa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- Q(a);CHECK,OGATEB,P_SPINQ(a),XP(H)::R(A)+B(E)
- Q(a);N_GUARD,XR(A)::P(D)
- Q(a);OGATE,XP(D)::R(A)+B(E),XQ(a)
- S(e);N_GUARD::B(N)
- S(e);N_GUARD::B(N),XS(e)
- P(f);OGATEB,XP(G)::QAR(I)
- Tries
- Try
- S(K);
- Threat
- S(K)
- Vars
- Q(a);CHECK,OGATEB,P_SPINQ(a),XP(H)::R(A)+B(E)
- P(f);OGATEB,XP(G)::QAR(I)
- Refutation
- P(h);XS(K)
- Try
- S(K);
- Threat
- S(K)
- Vars
- Q(a);N_GUARD,XP(C)::P(D)
- P(f);OGATEB,XP(G)::QAR(I)
- Refutation
- Q(a);CHECK,P_SPINQ(a),XP(H)
- Try
- S(K);
- Threat
- S(K)
- Vars
- Q(a);CHECK,OGATEB,P_SPINQ(a),XP(H)::R(A)+B(E)
- S(e);N_GUARD::B(N)
- Refutation
- P(f);XP(G)
- Try
- B(E);P_PINQ(a)
- Threat
- P(D)
- Vars
- B(c);N_GUARD::QAR(I)+P(H),XP(g)
- Refutation
- P(f);XP(G)
- Try
- B(E);P_PINQ(a),XP(i)
- Threat
- P(D)
- Vars
- P(f);OGATEB,XP(G)::QAR(I)
- B(c);N_GUARD::QAR(I)+P(H),XP(g)
- Refutation
- R(k);CHECK,XB(E)
- Try
- R(A);XQ(a)
- Threat
- P(D)
- Vars
- P(f);OGATEB,XP(G)::QAR(I)
- B(c);N_GUARD::QAR(I)+P(H),XP(g)
- Refutation
- P(b);XR(A)
- Try
- Q(I);P_PINP(f)
- Threat
- QAR1(I),XP(f)
- Vars
- S(e);N_GUARD::B(N)
- S(e);N_GUARD::B(N),XS(e)
- Refutation
- Q(a);CHECK,XP(H)
- Try
- P(H);CHECK,XP(g)
- Vars
- Q(a);CHECK,P_SPINQ(a),S_CUTB(c)::R(A)+B(E)
- Refutation
- B(c);P_SPINB(c)
- Try
- P(L);
- Threat
- QAB1(L),XP(g)
- Vars
- Q(a);CHECK,OGATEB,P_SPINQ(a),XP(H)::R(A)+B(E)
- Q(a);OGATE,XP(D)::R(A)+B(E),XQ(a)
- P(g);P_SPINP(g),XP(H)::QAB1(L)
- P(g);::QAB1(L)
- Refutation
- Q(a);
- Try
- Actual
- S(K);XP(h)
- Threat
- S(K)
- Vars
- Q(a);CHECK,OGATEB,P_SPINQ(a),XP(H)::R(A)+B(E)
- P(f);OGATEB,XP(G)::QAR(I)
- S(e);N_GUARD::B(N)
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).