MESON Chess Problem Database
Problem Display
PID: 17370 (3N4/4pB2/1p6/1KP1kpP1/pQ2br2/2rR1nP1/4q2b/B1NnR3 w - - 0 1)
Youngs, Joe Casey
HM., Four Way Pin Ty., 1946
#2
11 + 12
| 14773 | The Best American Chess Problems of 1946 | 1948 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sc6#
- 1...Qxd3+
- 2.Sxd3#
- 1...Qa2
- 2.Sc6#
- 1...Qb2
- 2.Sc6#
- 2.Rd5#
- 1...Qc2
- 2.Sc6#
- 2.Rd5#
- 1...Qd2
- 2.Sc6#
- 1...Qf2
- 2.Sc6#
- 2.Rd5#
- 1...Qg2
- 2.Sc6#
- 2.Rd5#
- 1...Bxd3+
- 2.Sxd3#
- 1...Bd5
- 2.Qxf4#
- 1...Bc6+
- 2.Sxc6#
- 1...Bb7
- 2.Qxf4#
- 1...Ba8
- 2.Qxf4#
- 1...Sxe1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sd4+
- 2.Qxd4#
- 1...Sh4
- 2.Qd4#
- 1...Sxg5
- 2.Qd4#
- 1...Qf1
- Tries
- 1.Bxc3+?
- 1...Sd4+
- 2.Bxd4#
- 2.Qxd4#
- 1...Sxc3+!
- 1...Sd4+
- 1.Ba2?
- threat
- 2.Sf7#
- 1...Qxd3+
- 2.Sxd3#
- 1...Bxd3+
- 2.Sxd3#
- 1...Bc6+
- 2.Sxc6#
- 1...Sd4+
- 2.Qxd4#
- 1...Sxg5
- 2.Qd4#
- 1...Bd5
- 2.Qxf4#
- 1...Qxa2!
- threat
- 1.Bb3?
- threat
- 2.Sf7#
- 1...Qxd3+
- 2.Sxd3#
- 1...Bxd3+
- 2.Sxd3#
- 1...Bc6+
- 2.Sxc6#
- 1...Sd4+
- 2.Qxd4#
- 1...Sxg5
- 2.Qd4#
- 1...Bd5
- 2.Qxf4#
- 1...axb3!
- threat
- 1.Rxe2?
- threat
- 2.Sc6#
- 2.Rd5#
- 1...Sd4+
- 2.Qxd4#
- 1...Sxg5
- 2.Qd4#
- 1...e6
- 2.Sc6#
- 1...Se3!
- threat
- 1.Qxc3+?
- 1...Sd4+
- 2.Qxd4#
- 1...Sxc3+!
- 1...Sd4+
- 1.Qc4?
- threat
- 2.Qe6#
- 1...Bc6+
- 2.Sxc6#
- 1...Sd4+
- 2.Qxd4#
- 1...Qxd3
- 2.Sxd3#
- 2.Sc6#
- 1...Bxd3
- 2.Sxd3#
- 2.Sc6#
- 1...Sxg5
- 2.Qd4#
- 1...Qa2
- 2.Sc6#
- 2.Rd5#
- 1...Bd5
- 2.Rxd5#
- 2.Qxd5#
- 2.Qxf4#
- 1...e6
- 2.Qxe6#
- 1...Qb2+!
- threat
- 1.c6?
- threat
- 2.Qxe7#
- 1...Qxd3+
- 2.Sxd3#
- 1...Bxd3+
- 2.Sxd3#
- 1...Bxc6+
- 2.Sxc6#
- 1...Sd4+
- 2.Qxd4#
- 1...Sxg5
- 2.Qd4#
- 1...Qb2
- 2.Rd5#
- 1...Bd5
- 2.Qxf4#
- 1...e6
- 2.Qd6#
- 1...Qa2!
- threat
- 1.Bxc3+?
- Keys
- 1.cxb6!
- threat
- 2.Qxe7#
- 1...Qxd3+
- 2.Sxd3#
- 1...Bxd3+
- 2.Sxd3#
- 1...Bc6+
- 2.Sxc6#
- 1...Sd4+
- 2.Qxd4#
- 1...Sxg5
- 2.Qd4#
- 1...Qa2
- 2.Sc6#
- 1...Qb2
- 2.Rd5#
- 1...Bd5
- 2.Qxf4#
- 1...e6
- 2.Qd6#
- threat
- 1.cxb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- Q(b);P_SPINB(g)::S(K)
- Q(b);CHECK,P_SPINB(g),XR(D)::S(B),XQ(b)
- Q(b);N_PINR(D),P_SPINB(g)::S(K)
- B(g);CHECK,P_SPINQ(b),XR(D)::S(B),XB(g)
- B(g);OGATE,P_SPINQ(b)::QAB1(F),XR(h)
- B(g);CHECK,N_GUARD,P_SPINQ(b)::S(K),XB(g)
- S(e);N_GUARD,XR(C)::QAB1(F)
- S(e);N_GUARD::QAB1(F)
- S(e);CHECK,N_GUARD,N_SPINR(d)::QAB1(F),XS(e)
- S(e);N_GUARD,XP(I)::QAB1(F)
- Tries
- Try
- B(A);CHECK,XR(d)
- Refutation
- S(a);CHECK,XB(A)
- Try
- B(J);
- Threat
- S(K)
- Vars
- Q(b);CHECK,P_SPINB(g),XR(D)::S(B),XQ(b)
- B(g);CHECK,P_SPINQ(b),XR(D)::S(B),XB(g)
- B(g);CHECK,N_GUARD,P_SPINQ(b)::S(K),XB(g)
- S(e);CHECK,N_GUARD,N_SPINR(d)::QAB1(F),XS(e)
- S(e);N_GUARD,XP(I)::QAB1(F)
- B(g);OGATE,P_SPINQ(b)::QAB1(F),XR(h)
- Refutation
- Q(b);N_PINR(D),P_SPINB(g),XB(J)
- Try
- B(J);
- Threat
- S(K)
- Vars
- Q(b);CHECK,P_SPINB(g),XR(D)::S(B),XQ(b)
- B(g);CHECK,P_SPINQ(b),XR(D)::S(B),XB(g)
- B(g);CHECK,N_GUARD,P_SPINQ(b)::S(K),XB(g)
- S(e);CHECK,N_GUARD,N_SPINR(d)::QAB1(F),XS(e)
- S(e);N_GUARD,XP(I)::QAB1(F)
- B(g);OGATE,P_SPINQ(b)::QAB1(F),XR(h)
- Refutation
- P(f);XB(J)
- Try
- R(C);N_SPINR(D),P_PINB(g),XQ(b)
- Threat
- DUALS(2)
- Vars
- S(e);CHECK,N_GUARD,N_SPINR(d)::QAB1(F),XS(e)
- S(e);N_GUARD,XP(I)::QAB1(F)
- P(l);::S(K)
- Refutation
- S(a);N_SPINB(g)
- Try
- Q(F);CHECK,XR(d)
- Vars
- S(e);CHECK,N_GUARD,P_SPINS(e)::QAB1(F),XS(e)
- Refutation
- S(a);CHECK,P_SPINS(a),XQ(F)
- Try
- Q(F);N_SPINR(D)
- Threat
- QAR1(F)
- Vars
- B(g);CHECK,N_GUARD,P_SPINQ(b)::S(K),XB(g)
- S(e);CHECK,N_GUARD,N_SPINR(d)::QAB1(F),XS(e)
- S(e);N_GUARD,XP(I)::QAB1(F)
- P(l);::QAR1(F),XP(l)
- Refutation
- Q(b);CHECK,N_SPINR(d),P_SPINB(g)
- Try
- P(H);
- Threat
- QAR2(F),XP(l)
- Vars
- Q(b);CHECK,P_SPINB(g),XR(D)::S(B),XQ(b)
- B(g);CHECK,P_SPINQ(b),XR(D)::S(B),XB(g)
- B(g);CHECK,P_SPINQ(b),XP(H)::S(K),XB(g)
- S(e);CHECK,N_GUARD,N_SPINR(d)::QAB1(F),XS(e)
- S(e);N_GUARD,XP(I)::QAB1(F)
- Q(b);N_PINR(D),N_SPINR(d),P_PINQ(F),P_SPINB(g)::R1(D)
- B(g);OGATE,P_SPINQ(b)::QAB1(F),XR(h)
- P(l);N_GUARD::QAB1(F)
- Refutation
- Q(b);N_PINR(D),P_SPINB(g)
- Try
- Actual
- P(H);XP(k)
- Threat
- QAR2(F),XP(l)
- Vars
- Q(b);CHECK,P_SPINB(g),XR(D)::S(B),XQ(b)
- B(g);CHECK,P_SPINQ(b),XR(D)::S(B),XB(g)
- B(g);CHECK,N_GUARD,P_SPINQ(b)::S(K),XB(g)
- S(e);CHECK,N_GUARD,N_SPINR(d)::QAB1(F),XS(e)
- S(e);N_GUARD,XP(I)::QAB1(F)
- Q(b);N_PINR(D),P_SPINB(g)::S(K)
- Q(b);N_PINR(D),N_SPINR(d),P_PINQ(F),P_SPINB(g)::R1(D)
- B(g);OGATE,P_SPINQ(b)::QAB1(F),XR(h)
- P(l);N_GUARD::QAB1(F)
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).