MESON Chess Problem Database
Problem Display
PID: 17358 (BbbR4/q3Q2K/2rn2N1/Rpnk1P1p/1P2p2r/NPPP4/7B/8 w - - 0 1)
de Blasio, Francis JC
3= Prize, Enroque!!, 1946
#2
13 + 11
| 14773 | The Best American Chess Problems of 1946 | 1948 |
SOLUTION
- SOUND
- Sets
- 1...Qb6
- 2.Qe5#
- 1...Qxa5
- 2.Qe5#
- 1...Qa6
- 2.Qe5#
- 1...Qxe7+
- 2.Sxe7#
- 1...Qxa8
- 2.Qe5#
- 1...Rxh2
- 2.Sf4#
- 1...Rh3
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Bc7
- 2.Qe5#
- 1...Bb7
- 2.Qe5#
- 1...Bd7
- 2.Qe5#
- 1...Sb7
- 2.Qe5#
- 1...Sd7
- 2.Qe6#
- 1...Qb6
- Tries
- 1.Rd7?
- threat
- 2.Qe5#
- 1...Sxd3
- 2.Qe6#
- 2.Qf7#
- 1...Sxd7
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Qxd7!
- threat
- 1.Qc7?
- threat
- 2.Se7#
- 2.Bxc6#
- 2.Rxd6#
- 1...Qxa8
- 2.Se7#
- 1...Rxh2
- 2.Bxc6#
- 2.Rxd6#
- 1...Bxc7
- 2.Se7#
- 1...Bxf5
- 2.Rxd6#
- 1...exd3
- 2.Bxc6#
- 1...Qb6
- 2.Se7#
- 2.Rxd6#
- 1...Qa6
- 2.Se7#
- 2.Rxd6#
- 1...Qb7
- 2.Se7#
- 1...Rf4
- 2.Bxc6#
- 2.Rxd6#
- 1...Bb7
- 2.Se7#
- 1...Bd7
- 2.Se7#
- 1...Sb7
- 2.Se7#
- 1...Sd7
- 2.Se7#
- 2.Bxc6#
- 2.Qxc6#
- 1...Qxc7+!
- threat
- 1.Qd7?
- threat
- 2.Se7#
- 2.Bxc6#
- 1...Qxa8
- 2.Se7#
- 1...Rxh2
- 2.Bxc6#
- 1...Bxd7
- 2.Se7#
- 1...Sxd7
- 2.Se7#
- 1...exd3
- 2.Bxc6#
- 1...Qb6
- 2.Se7#
- 1...Qa6
- 2.Se7#
- 1...Qb7
- 2.Se7#
- 1...Qc7
- 2.Se7#
- 1...Rf4
- 2.Bxc6#
- 1...Bb7
- 2.Se7#
- 1...Sb7
- 2.Se7#
- 1...Qxd7+!
- threat
- 1.Rd7?
- Keys
- 1.Sc2!
- threat
- 2.Se3#
- 1...Qxe7+
- 2.Sxe7#
- 1...Sxb3
- 2.c4#
- 1...Sxd3
- 2.c4#
- 1...Rh3
- 2.Sf4#
- 1...Sa4
- 2.c4#
- 1...Sa6
- 2.c4#
- 1...Se6
- 2.c4#
- 1...Sb7
- 2.Qe5#
- 1...Sd7
- 2.Qe6#
- 1...e3
- 2.Sxe3#
- threat
- 1.Sc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 9
- Sets
- Q(i);N_PINQ(J)::QAR1(J)
- Q(i);N_PINQ(J),XR(G)::QAR1(J)
- Q(i);CHECK,XQ(J)::S(I),XQ(i)
- Q(i);N_PINQ(J),N_SPINR(g),XB(L)::QAR1(J)
- R(b);N_GUARD,XB(A)::S(I)
- R(b);N_GUARD::S(I)
- R(b);N_GUARD::S(I),XR(b)
- B(j);N_PINQ(J)::QAR1(J)
- B(k);N_PINQ(J),N_SPINR(g)::QAR1(J)
- B(k);N_PINQ(J),N_SPINS(h)::QAR1(J)
- S(d);N_PINQ(J),N_SPINR(g),P_SPINP(c)::QAR1(J)
- S(d);N_PINQ(J),N_SPINS(h),P_SPINP(c)::QAB1(J)
- Tries
- Try
- R(M);N_SPINQ(J)
- Threat
- QAR1(J)
- Vars
- S(d);N_GUARD,N_SPINS(h),P_SPINP(c),XR(M)::QAB1(J)
- S(d);N_GUARD,P_SPINP(c)::QAB1(J),XS(d)
- Refutation
- Q(i);N_SPINS(h),P_PINQ(J),XR(M)
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- Q(i);N_PINQ(J),N_SPINR(g),XB(L)::S(I)
- B(j);XQ(J)::S(I)
- B(k);P_PINS(I),XP(H)::R1(M),XS(h)
- P(a);XP(E)::B(L),XR(g)
- Q(i);N_SPINR(g)::S(I)
- B(k);N_PINQ(J),N_SPINR(g)::S(I)
- B(k);N_PINQ(J),N_SPINS(h)::S(I)
- S(d);N_PINQ(J),N_SPINR(g),P_SPINP(c)::S(I)
- Refutation
- Q(i);CHECK,XQ(J)
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- Q(i);N_PINQ(J),N_SPINR(g),XB(L)::S(I)
- R(b);XB(A)::B(L),XR(g)
- B(k);N_SPINS(h),XQ(J)::S(I)
- S(d);N_SPINS(h),P_SPINP(c),XQ(J)::S(I)
- P(a);XP(E)::B(L),XR(g)
- Q(i);N_PINQ(J)::S(I)
- Q(i);N_SPINR(g)::S(I)
- Q(i);::S(I)
- R(b);::B(L),XR(g)
- B(k);N_PINQ(J),N_SPINR(g)::S(I)
- S(d);N_PINQ(J),N_SPINR(g),P_SPINP(c)::S(I)
- Refutation
- Q(i);CHECK,N_SPINS(h),XQ(J)
- Try
- Actual
- S(B);
- Threat
- S(B)
- Vars
- Q(i);CHECK,XQ(J)::S(I),XQ(i)
- S(d);P_SPINP(c),XP(C)::P(D)
- S(d);P_SPINP(c),XP(E)::P(D)
- R(b);N_GUARD::S(I)
- S(d);P_SPINP(c)::P(D)
- S(d);N_PINQ(J),N_SPINR(g),P_SPINP(c)::QAR1(J)
- S(d);N_PINQ(J),N_SPINS(h),P_SPINP(c)::QAB1(J)
- P(a);::S(B),XP(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).