MESON Chess Problem Database
Problem Display
PID: 44329 (1N1B1b2/3ppQp1/P7/6R1/1k4r1/rP2p1p1/PP2N3/1nK5 w - - 0 1)
Dean, EF
The Problemist, 1929
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxb3
- 2.Qxb3#
- 1...Ra5
- 2.Bxa5#
- 1...Rxa6
- 2.Sxa6#
- 1...Rc4+
- 2.Qxc4#
- 1...Rf4
- 2.Qxf4#
- 1...Rxg5
- 2.Qc4#
- 1...Sc3
- 2.bxc3#
- 1...d6
- 2.Sc6#
- 1...Rxb3
- Tries
- 1.Sf4?
- threat
- 2.Sd3#
- 2.Qc4#
- 1...Rxb3
- 2.Qxb3#
- 1...Rxf4
- 2.Qxf4#
- 1...Rxg5
- 2.Qc4#
- 1...e5
- 2.Qc4#
- 1...Sd2
- 2.Sd3#
- 1...e6
- 2.Sd3#
- 1...d5!
- threat
- 1.Bxe7+?
- 1...d6
- 2.Sc6#
- 1...Bxe7!
- 1...d6
- 1.Rxg4+?
- 1...Kb5
- 2.Qc4#
- 2.Qd5#
- 1...Kc5!
- 1...Kb5
- 1.Qd5?
- threat
- 2.Rxg4#
- 2.Qb7#
- 2.Qb5#
- 2.Qc5#
- 1...Rc4+
- 2.Qxc4#
- 1...Rxa2
- 2.Rxg4#
- 2.Qb7#
- 2.Qb5#
- 1...Rxb3
- 2.Rxg4#
- 2.Qxb3#
- 2.Qb5#
- 1...Rxa6
- 2.Sxa6#
- 2.Rxg4#
- 2.Qb5#
- 2.Qc5#
- 1...Rxg5
- 2.Qc4#
- 1...Ra5
- 2.Bxa5#
- 2.Rxg4#
- 2.Qxa5#
- 1...Rd4
- 2.Qb7#
- 2.Qxd4#
- 2.Qb5#
- 2.Qc5#
- 1...Re4
- 2.Qxe4#
- 2.Qb7#
- 2.Qb5#
- 2.Qc5#
- 1...Rf4
- 2.Qb7#
- 2.Qb5#
- 2.Qc5#
- 1...Rh4
- 2.Qb7#
- 2.Qb5#
- 2.Qc5#
- 1...Sd2
- 2.Qb7#
- 2.Qb5#
- 2.Qc5#
- 1...Sc3
- 2.Qc5#
- 2.bxc3#
- 1...d6
- 2.Sc6#
- 2.Rxg4#
- 2.Qb7#
- 2.Qb5#
- 1...e6
- 2.Rxg4#
- 2.Qb7#
- 2.Qb5#
- 1...e5!
- threat
- 1.Qxe7+?
- 1...d6
- 2.Sc6#
- 2.Qb7#
- 1...Bxe7!
- 1...d6
- 1.bxa3+?
- 1...Sxa3
- 2.Ba5#
- 1...Kxa3!
- 1...Sxa3
- 1.Sf4?
- Keys
- 1.Qe6!
- threat
- 2.Qxg4#
- 2.Qb6#
- 1...Rc4+
- 2.Qxc4#
- 1...Rxa2
- 2.Qb6#
- 1...Rxb3
- 2.Qxb3#
- 2.Qxg4#
- 1...Rxa6
- 2.Sxa6#
- 2.Qxg4#
- 1...Rxg5
- 2.Qc4#
- 1...dxe6
- 2.Sc6#
- 1...d5
- 2.Qb6#
- 1...Ra5
- 2.Bxa5#
- 2.Qxg4#
- 1...Rd4
- 2.Qb6#
- 1...Re4
- 2.Qxe4#
- 2.Qb6#
- 1...Rf4
- 2.Qb6#
- 1...Rh4
- 2.Qb6#
- 1...Sd2
- 2.Qb6#
- 1...Sc3
- 2.bxc3#
- 1...d6
- 2.Sc6#
- 2.Qxg4#
- threat
- 1.Qe6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 4
- Sets
- R(b);OGATE,XP(E)::QAR1(H),XR(b)
- R(b);N_GUARD::B(J),XR(b)
- R(b);XP(G)::S(I),XR(b)
- R(f);CHECK,N_GUARD::QAR1(H),XR(f)
- R(f);N_GUARD::QAR(H),XR(f)
- R(f);N_GUARD,XR(F)::QAR1(H)
- S(a);OGATE::P(C),XS(a)
- P(g);N_GUARD::S(I)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(b);OGATE,XP(E)::QAR1(H),XR(b)
- R(f);OGATE,XS(D)::QAR(H),XR(f)
- R(f);XR(F)::QAR1(H)
- P(h);::QAR1(H)
- S(a);::S(D)
- P(h);::S(D)
- Refutation
- P(g);
- Try
- B(J);CHECK,XP(h)
- Vars
- P(g);P_SPINP(g)::S(I)
- Refutation
- B(j);XB(J)
- Try
- R(F);CHECK,XR(f)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(H);
- Threat
- DUALS(4)
- Vars
- R(f);CHECK,N_GUARD::QAR1(H),XR(f)
- R(f);N_GUARD,XR(F)::QAR1(H)
- Refutation
- P(h);
- Try
- Q(H);CHECK,XP(h)
- Refutation
- B(j);XQ(H)
- Try
- P(C);CHECK,XR(b)
- Vars
- S(a);SBLOCK,XP(C)::B(J)
- Refutation
- K(e);S_FLIGHT,XP(C)
- Try
- Actual
- Q(H);
- Threat
- DUALS(2)
- Vars
- R(f);CHECK,N_GUARD::QAR1(H),XR(f)
- R(b);XP(B)::QAR2(H)
- R(f);N_GUARD,XR(F)::QAR1(H)
- P(g);N_GUARD,XQ(H)::S(I)
- P(g);::QAR2(H)
- R(f);::QAR2(H)
- S(a);::QAR2(H)
- S(a);OGATE::P(C),XS(a)
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).