MESON Chess Problem Database
Problem Display
PID: 52647 (B7/2Bp1Q2/2b1r1p1/2pk2P1/4R3/8/NRN3K1/1n6 w - - 0 1)
Dobbs, Gilbert S
Chess Amateur (The), 1908
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Kxe4
- 2.Qf3#
- 1...Bb7
- 2.Bxb7#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...c4
- 2.Re5#
- 1...d6
- 2.Qxe6#
- 1...Kxe4
- Tries
- 1.Kf2?
- 1...Kxe4
- 2.Qf3#
- 1...Bb7
- 2.Bxb7#
- 1...c4
- 2.Re5#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...d6
- 2.Qxe6#
- 1...Bxa8!
- 1...Kxe4
- 1.Kg3?
- 1...Kxe4
- 2.Qf3#
- 1...Bb7
- 2.Bxb7#
- 1...c4
- 2.Re5#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...d6
- 2.Qxe6#
- 1...Bxa8!
- 1...Kxe4
- 1.Sab4+?
- 1...Kxe4
- 2.Qf3#
- 2.Qf4#
- 1...cxb4!
- 1...Kxe4
- 1.Scb4+?
- 1...Kxe4
- 2.Qf4#
- 1...cxb4!
- 1...Kxe4
- 1.Bb8?
- 1...Kxe4
- 2.Qf3#
- 1...Bb7
- 2.Bxb7#
- 1...c4
- 2.Re5#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...d6
- 2.Qxe6#
- 1...Bxa8!
- 1...Kxe4
- 1.Bxc6+?
- 1...dxc6
- 2.Qxe6#
- 1...Kxc6!
- 1...dxc6
- 1.Bb7?
- 1...Kxe4
- 2.Qf3#
- 1...c4
- 2.Re5#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...d6
- 2.Qxe6#
- 1...Bxb7!
- 1...Kxe4
- 1.Rxb1?
- threat
- 2.Sc3#
- 1...Kxe4
- 2.Qf3#
- 1...Bb7
- 2.Bxb7#
- 1...c4
- 2.Re5#
- 1...Bxa8!
- threat
- 1.Rb3?
- 1...Kxe4
- 2.Qf3#
- 1...Bb7
- 2.Bxb7#
- 1...c4
- 2.Re5#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...d6
- 2.Qxe6#
- 1...Bxa8!
- 1...Kxe4
- 1.Rb5?
- threat
- 2.Rd4#
- 1...Kxe4
- 2.Qf3#
- 1...Bb7
- 2.Bxb7#
- 1...d6
- 2.Qxe6#
- 1...Bxa8!
- threat
- 1.Rb6?
- 1...Kxe4
- 2.Qf3#
- 1...c4
- 2.Re5#
- 1...Bb7
- 2.Bxb7#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...d6
- 2.Bxc6#
- 2.Qxe6#
- 1...Bxa8!
- 1...Kxe4
- 1.Rb8?
- 1...Kxe4
- 2.Qf3#
- 1...Bb7
- 2.Bxb7#
- 1...c4
- 2.Re5#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...d6
- 2.Qxe6#
- 1...Bxa8!
- 1...Kxe4
- 1.Qf5+?
- 1...Re5
- 2.Se3#
- 2.Qxe5#
- 1...gxf5!
- 1...Re5
- 1.Qxd7+?
- 1...Rd6
- 2.Bxc6#
- 1...Kxe4!
- 1...Rd6
- 1.Kf2?
- Keys
- 1.Rb7!
- 1...Kxe4
- 2.Qf3#
- 1...Bxb7
- 2.Bxb7#
- 1...Ba4
- 2.Rb5#
- 1...Bb5
- 2.Rxb5#
- 1...c4
- 2.Re5#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...d6
- 2.Qxe6#
- 1...Kxe4
- 1.Rb7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATEB::B(I),XB(d)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(b);SBLOCK::R1(E)
- P(g);N_GUARD::QAB1(H),XR(e)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATEB::B(I),XB(d)
- P(b);SBLOCK::R1(E)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::QAB1(H),XR(e)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- K(D);P-FLIGHT
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATEB::B(I),XB(d)
- P(b);SBLOCK::R1(E)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::QAB1(H),XR(e)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- S(A);CHECK
- Refutation
- P(b);XS(A)
- Try
- S(C);CHECK
- Vars
- K(c);N_SPINR(e),S_FLIGHT,XR(E)::QAR1(H)
- Refutation
- P(b);XS(C)
- Try
- B(G);
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATEB::B(I),XB(d)
- P(b);SBLOCK::R1(E)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::QAB1(H),XR(e)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- B(I);CHECK,XB(d)
- Vars
- P(g);XB(I)::QAB1(H),XR(e)
- Refutation
- K(c);N_SPINR(e),S_FLIGHT,XB(I)
- Try
- B(I);
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- P(b);SBLOCK::R1(E)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::QAB1(H),XR(e)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- R(B);XS(a)
- Threat
- S(A)
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATEB::B(I),XB(d)
- P(b);SBLOCK::R1(E)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- R(B);
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATEB::B(I),XB(d)
- P(b);SBLOCK::R1(E)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::QAB1(H),XR(e)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- R(B);P_PINP(b)
- Threat
- R1(E)
- Vars
- K(c);N_SPINP(b),N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATEB::B(I),XB(d)
- P(g);N_GUARD::QAB1(H),XR(e)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- R(B);
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- P(b);SBLOCK::R1(E)
- B(d);OGATEB::B(I),XB(d)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- R(B);
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATEB::B(I),XB(d)
- P(b);SBLOCK::R1(E)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::QAB1(H),XR(e)
- Refutation
- B(d);N_SPINB(d),XB(I)
- Try
- Q(H);CHECK,N_PINR(e)
- Refutation
- P(f);XQ(H)
- Try
- Q(H);CHECK,N_PINR(e),XP(g)
- Vars
- R(e);P_SPINR(e)::B(I),XB(d)
- Refutation
- K(c);S_FLIGHT,XR(E)
- Try
- Actual
- R(B);N_PINB(d)
- Vars
- K(c);N_SPINR(e),OGATEB,S_FLIGHT,XR(E)::QAB1(H)
- B(d);OGATE,P_SPINB(d),XR(B)::B(I),XB(d)
- B(d);OGATEB::B(I)+R(B)
- B(d);OGATEB::B(I)+R(B),XB(d)
- P(b);SBLOCK::R1(E)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- P(g);N_GUARD::QAB1(H),XR(e)
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).