MESON Chess Problem Database
Problem Display
PID: 6874 (1b3N2/np6/1pkrN3/3R4/1P1Q1B2/8/q1BK4/2R5 w - - 0 1)
Mansfield, Comins
La Settimana Enigmistica, 1934/I
#2
9 + 7
| 3550 | Complete Mansfield/II | 1997 |
| 5454 | Near Snap | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Bxb1#
- 2.Ba4#
- 2.Qc4#
- 1...Qb3
- 2.Bxb3#
- 1...Qc4
- 2.Qxc4#
- 1...Qxd5
- 2.Ba4#
- 1...Qa1
- 2.Ba4#
- 2.Qc4#
- 1...Qb2
- 2.Qc4#
- 1...Qxc2+
- 2.Rxc2#
- 1...Qa3
- 2.Ba4#
- 2.Qc4#
- 1...Qa4
- 2.Bb3#
- 2.Bxa4#
- 2.Qc4#
- 1...Qa5
- 2.Ba4#
- 1...Qa6
- 2.Ba4#
- 1...Rd8
- 2.Sxd8#
- 1...Sc8
- 2.b5#
- 1...b5
- 2.Qc5#
- 1...Qb1
- Tries
- 1.Kd1?
- threat
- 2.Ba4#
- 1...Qxc2+
- 2.Rxc2#
- 1...Qb3
- 2.Bxb3#
- 1...Qc4
- 2.Qxc4#
- 1...Qa4
- 2.Bb3#
- 2.Bxa4#
- 2.Qc4#
- 1...b5
- 2.Qc5#
- 1...Sb5!
- threat
- 1.Rxd6+?
- 1...Kb5
- 2.Rxb6#
- 1...Bxd6!
- 1...Kb5
- 1.Qc3+?
- 1...Qc4
- 2.Qxc4#
- 1...Kxd5!
- 1...Qc4
- 1.Qxb6+?
- 1...Kxd5
- 2.Qc5#
- 1...Kxb6!
- 1...Kxd5
- 1.Kd1?
- Keys
- 1.Qe4!
- 1...Qxd5+
- 2.Bd3#
- 1...Qxc2+
- 2.Rxc2#
- 1...Rxd5+
- 2.Sd4#
- 1...Rxe6
- 2.Rc5#
- 1...b5
- 2.Rxd6#
- 1...Sb5
- 2.Rxd6#
- 1...Qb1
- 2.Bxb1#
- 2.Ba4#
- 2.Qc4#
- 1...Qb3
- 2.Bxb3#
- 1...Qc4
- 2.Qxc4#
- 1...Qa1
- 2.Ba4#
- 2.Qc4#
- 1...Qb2
- 2.Qc4#
- 1...Qa3
- 2.Ba4#
- 2.Qc4#
- 1...Qa4
- 2.Bb3#
- 2.Bxa4#
- 2.Qc4#
- 1...Qa5
- 2.Ba4#
- 1...Qa6
- 2.Ba4#
- 1...Rd7
- 2.Sd4#
- 1...Rd8
- 2.Sd4#
- 2.Sxd8#
- 1...Bc7
- 2.Sd4#
- 1...Sc8
- 2.b5#
- 1...Qxd5+
- 1.Qe4!
Anticipated by 6622(1932)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- Q(a);N_PINB(B)::R(A)+B(B),XQ(a)
- Q(a);N_GUARD,N_PINB(B)::QAR2(E),XQ(a)
- Q(a);N_PINB(B),P_PINQ(E),XR(G)::R(A)+B(B),DCHECK
- Q(a);N_GUARD::QAR2(E)
- Q(a);CHECK,OGATE,P_SPINQ(a),XB(B)::R(A),XQ(a)
- Q(a);N_PINB(B),P_PINP(D)::R(A)+B(B),DCHECK
- Q(a);N_PINB(B)::R(A)+B(B),DCHECK
- R(d);N_GUARD::S(H),XR(d)
- S(e);N_GUARD::P(D)
- P(b);N_GUARD::QAR1(E)
- Tries
- Try
- K(C);N_SPINB(B),P-FLIGHT
- Threat
- R(A)+B(B),DCHECK
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XB(B)::R(A),XQ(a)
- Q(a);N_GUARD,P_PINB(B)::R(A)+B(B),XQ(a)
- Q(a);N_GUARD::QAR2(E),XQ(a)
- P(b);N_GUARD::QAR1(E)
- Refutation
- S(e);
- Try
- R(G);CHECK,XR(d)
- Vars
- K(c);OGATE,S_FLIGHT::R1(G),XP(b)
- Refutation
- B(g);XR(G)
- Try
- Q(E);CHECK,P_SPINR(G)
- Vars
- Q(a);N_GUARD,N_PINB(B),P_SPINQ(a)::QAR2(E),XQ(a)
- Refutation
- K(c);S_FLIGHT,XR(G)
- Try
- Q(E);CHECK,P_SPINR(G),XP(b)
- Vars
- K(c);S_FLIGHT,XR(G)::QAR1(E)
- Refutation
- K(c);P-FLIGHT,XQ(E)
- Try
- Actual
- Q(E);P_SPINR(G)
- Vars
- Q(a);CHECK,N_PINB(B),P_SPINQ(a),XR(G)::R(A)+B(B)
- Q(a);CHECK,OGATE,P_SPINQ(a),XB(B)::R(A),XQ(a)
- R(d);CHECK,P_SPINR(d),XR(G)::S(H)
- R(d);N_PINR(G),XS(H)::QAB(E)+R(G),DCHECK
- P(b);SBLOCK::QAB(E)+R(G),DCHECK,XR(d)
- S(e);SBLOCK::QAB(E)+R(G),DCHECK,XR(d)
- Q(a);N_PINB(B)::R(A)+B(B),XQ(a)
- Q(a);N_GUARD,N_PINB(B)::QAR2(E),XQ(a)
- Q(a);N_GUARD::QAR2(E)
- Q(a);N_PINB(B),P_PINP(D)::R(A)+B(B),DCHECK
- Q(a);N_PINB(B)::R(A)+B(B),DCHECK
- R(d);::S(H)
- B(g);SBLOCK::S(H)
- S(e);N_GUARD::P(D)
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).