MESON Chess Problem Database
Problem Display
PID: 198748 (8/4K1P1/4P3/3pR3/Q2NqkNB/4R3/5p2/5B2 w - - 0 1)
Meschick, AG
L'Alfiere di Re, 1921
#2
10 + 4
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Se2#
- 1...Qh1
- 2.Se2#
- 1...Qc2
- 2.Se2#
- 1...Qg2
- 2.Se2#
- 1...Qd3
- 2.Se2#
- 1...Qf3
- 2.Se2#
- 1...Qf5
- 2.Se2#
- 1...Qg6
- 2.Se2#
- 1...Qh7
- 2.Se2#
- 1...Qxd4
- 2.Qxd4#
- 1...Qb1
- Tries
- 1.Sxf2?
- 1...Kxe5
- 2.Sd3#
- 2.Bg3#
- 1...Qxe3
- 2.Rf5#
- 1...Qxd4
- 2.Bg3#
- 2.Bg5#
- 2.Qxd4#
- 1...Qxe5
- 2.Rf3#
- 1...Qb1
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Qh1
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Qc2
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Qg2
- 2.Se2#
- 1...Qd3
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Qf3
- 2.Se2#
- 1...Qf5
- 2.Se2#
- 1...Qg6
- 2.Se2#
- 1...Qh7
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Kxe3!
- 1...Kxe5
- 1.Rf3+?
- 1...Qxf3
- 2.Se2#
- 1...Kxg4!
- 1...Qxf3
- 1.Rg3?
- threat
- 2.Se2#
- 1...Qxd4
- 2.Qxd4#
- 1...Qe2
- 2.Sxe2#
- 1...Qxe5!
- threat
- 1.Rf5+?
- 1...Qxf5
- 2.Se2#
- 1...Kxg4!
- 1...Qxf5
- 1.Rg5?
- threat
- 2.Se2#
- 1...Qxe6+
- 2.Sxe6#
- 1...Qxd4
- 2.Qxd4#
- 1...Qxe3!
- threat
- 1.Qd1?
- threat
- 2.Bg3#
- 2.Bg5#
- 1...Qxe5
- 2.Qf3#
- 1...Qf3
- 2.Qxf3#
- 1...Qg2
- 2.Bg5#
- 2.Rf5#
- 1...Qf5
- 2.Rxf5#
- 2.Qf3#
- 1...Qg6
- 2.Bg3#
- 2.Qf3#
- 1...Qxe3!
- threat
- 1.g8Q?
- threat
- 2.Se2#
- 2.Bg3#
- 2.Qg5#
- 1...Qxe3
- 2.Qg5#
- 1...Qxd4
- 2.Bg3#
- 2.Qxd4#
- 2.Qg5#
- 1...Qxe5
- 2.Bg3#
- 1...Qg6
- 2.Se2#
- 1...Qg2
- 2.Se2#
- 2.Rf5#
- 2.Qg5#
- 1...Qf3
- 2.Se2#
- 2.Rxf3#
- 2.Rf5#
- 2.Qg5#
- 1...Qf5
- 2.Se2#
- 2.Bg3#
- 2.Rf3#
- 2.Rxf5#
- 1...Qh7+!
- threat
- 1.Sxf2?
- Keys
- 1.Sf6!
- 1...Kxe3
- 2.Bg5#
- 1...Kxe5
- 2.Bg3#
- 1...Qxe3
- 2.Rf5#
- 1...Qxd4
- 2.Bg3#
- 2.Bg5#
- 2.Qxd4#
- 1...Qxe5
- 2.Rf3#
- 1...Qb1
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Qh1
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Qc2
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Qg2
- 2.Se2#
- 1...Qd3
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Qf3
- 2.Se2#
- 1...Qf5
- 2.Se2#
- 1...Qg6
- 2.Se2#
- 1...Qh7
- 2.Se2#
- 2.Bg3#
- 2.Bg5#
- 1...Kxe3
- 1.Sf6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 6
- Sets
- Q(b);::QAR(C)+S(D),DCHECK
- Q(b);P_PINP(J)::QAR(C)+S(D),DCHECK
- Q(b);OGATE,P_SPINQ(b),XS(D)::QAR2(C),XQ(b)
- Tries
- Try
- S(E);XP(a)
- Vars
- Q(b);N_GUARD,SBLOCK,XR(B)::R1(G)
- Q(b);N_GUARD,P_PINP(H),SBLOCK,XR(G)::R1(B)
- Q(b);::QAR(C)+S(D),DCHECK
- Refutation
- K(c);P_SPINQ(b),S_FLIGHT,XR(B)
- Try
- R(B);CHECK
- Vars
- Q(b);SBLOCK,XR(B)::QAR(C)+S(D),DCHECK
- Refutation
- K(c);P-FLIGHT,XS(E)
- Try
- R(B);
- Threat
- S(D)
- Vars
- Q(b);OGATE,P_SPINQ(b),XS(D)::QAR2(C),XQ(b)
- Q(b);::QAR(C)+S(D),DCHECK,XQ(b)
- Refutation
- Q(b);P_PINP(H),XR(G)
- Try
- R(G);CHECK,P_SPINP(H)
- Vars
- Q(b);N_PINP(H),SBLOCK,XR(G)::QAR(C)+S(D),DCHECK
- Refutation
- K(c);P-FLIGHT,XS(E)
- Try
- R(G);P_SPINP(H)
- Threat
- S(D)
- Vars
- Q(b);CHECK,XP(H)::QAR(C)+S(D),DCHECK,XQ(b)
- Q(b);N_PINP(H),OGATE,P_SPINQ(b),XS(D)::QAR2(C),XQ(b)
- Refutation
- Q(b);XR(B)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD,P_PINP(H),XR(G)::QAR1(C)
- Q(b);N_GUARD::QAR1(C),XQ(b)
- Refutation
- Q(b);XR(B)
- Try
- P(J);
- Threat
- DUALS(3)
- Vars
- Q(b);XR(B)::QAB1(J)
- Q(b);P_PINP(H),XR(G)::B(F)
- Q(b);::QAR(C)+S(D),DCHECK
- Refutation
- Q(b);CHECK
- Try
- Actual
- S(E);
- Vars
- K(c);P_SPINQ(b),S_FLIGHT,XR(B)::B(F)
- K(c);P_SPINQ(b),S_FLIGHT,XR(G)::B(F)
- Q(b);N_GUARD,SBLOCK,XR(B)::R1(G)
- Q(b);N_GUARD,P_PINP(H),SBLOCK,XR(G)::R1(B)
- Q(b);::QAR(C)+S(D),DCHECK
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).