MESON Chess Problem Database
Problem Display
PID: 267078 (3R4/5p1r/2P3n1/nK1B2r1/2pk2b1/2N2p2/2P5/2B1Q1b1 w - - 0 1)
Morra, Juan Carlos
The Problemist, 1955
#2
8 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxd5+
- 2.Rxd5#
- 1...Re5
- 2.Qd2#
- 1...Bh2
- 2.Qe3#
- 1...Be3
- 2.Qxe3#
- 1...Bf5
- 2.Be6#
- 1...f2
- 2.Qe3#
- 1...f5
- 2.Bf7#
- 1...Rxd5+
- Tries
- 1.Kb4?
- threat
- 2.Sb5#
- 2.Qe4#
- 1...Be3
- 2.Qxe3#
- 1...Re5
- 2.Sb5#
- 2.Qd2#
- 2.Qd1#
- 1...Bf5
- 2.Sb5#
- 2.Be6#
- 1...Bd7
- 2.Qe4#
- 1...f5
- 2.Sb5#
- 2.Bf7#
- 1...Sxc6+!
- threat
- 1.Kb6?
- threat
- 2.Sb5#
- 1...Be3
- 2.Qxe3#
- 1...Bd7!
- threat
- 1.Sb1?
- threat
- 2.Qc3#
- 2.Qe4#
- 1...Be3
- 2.Qc3#
- 2.Qxe3#
- 1...Bd7
- 2.Qe4#
- 1...Re5
- 2.Qd2#
- 2.Qc3#
- 2.Qd1#
- 1...Bf5
- 2.Be6#
- 2.Qc3#
- 1...c3
- 2.Qxc3#
- 2.Qe4#
- 1...f5
- 2.Bf7#
- 2.Qc3#
- 1...Rxd5+!
- threat
- 1.Sd1?
- threat
- 2.Qc3#
- 2.Qe4#
- 1...Be3
- 2.Qc3#
- 2.Qxe3#
- 1...Bd7
- 2.Qe4#
- 1...Re5
- 2.Qd2#
- 2.Qc3#
- 1...Bf5
- 2.Be6#
- 2.Qc3#
- 1...c3
- 2.Qxc3#
- 2.Qe4#
- 1...f5
- 2.Bf7#
- 2.Qc3#
- 1...Rxd5+!
- threat
- 1.Sa2?
- threat
- 2.Qc3#
- 2.Qe4#
- 1...Be3
- 2.Qc3#
- 2.Qxe3#
- 1...Bd7
- 2.Qe4#
- 1...Re5
- 2.Qd2#
- 2.Qc3#
- 2.Qd1#
- 1...Bf5
- 2.Be6#
- 2.Qc3#
- 1...c3
- 2.Qxc3#
- 2.Qe4#
- 1...f5
- 2.Bf7#
- 2.Qc3#
- 1...Rxd5+!
- threat
- 1.Sa4?
- threat
- 2.Qc3#
- 2.Qe4#
- 1...Be3
- 2.Qc3#
- 2.Qxe3#
- 1...Bd7
- 2.Qe4#
- 1...Re5
- 2.Qd2#
- 2.Qc3#
- 2.Qd1#
- 1...Bf5
- 2.Be6#
- 2.Qc3#
- 1...c3
- 2.Qxc3#
- 2.Qe4#
- 1...f5
- 2.Bf7#
- 2.Qc3#
- 1...Rxd5+!
- threat
- 1.Bd2?
- threat
- 2.Qe4#
- 1...Rxd5+
- 2.Rxd5#
- 1...Be3
- 2.Qxe3#
- 1...Bf5
- 2.Be6#
- 1...f5
- 2.Bf7#
- 1...Re5!
- threat
- 1.Qd1+?
- 1...Kxc3
- 2.Qd2#
- 1...Ke5!
- 1...Kxc3
- 1.Kb4?
- Keys
- 1.Bb2!
- threat
- 2.Qe4#
- 1...Rxd5+
- 2.Rxd5#
- 1...Be3
- 2.Se2#
- 1...Re5
- 2.Qd2#
- 1...Bf5
- 2.Be6#
- 1...f5
- 2.Bf7#
- threat
- 1.Bb2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(g);CHECK,OGATE,P_SPINR(g),XB(F)::R1(H),XR(g)
- R(g);SBLOCK::QAR2(B)
- B(a);N_GUARD::QAB1(B)
- B(a);N_GUARD::QAB1(B),XB(a)
- B(e);N_PINB(F)::R(H)+B(F)
- P(b);S_CUTB(a)::QAB1(B)
- P(i);N_PINB(F)::R(H)+B(F)
- Tries
- Try
- K(E);N_SPINB(F),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- B(a);N_GUARD::QAB1(B),XB(a)
- B(e);::QAR1(B)
- Refutation
- S(f);CHECK,XP(G)
- Try
- K(E);N_SPINB(F),P-FLIGHT
- Threat
- S(D)
- Vars
- B(a);N_GUARD::QAB1(B),XB(a)
- Refutation
- B(e);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- B(e);P_PINP(G)::QAR1(B)
- Refutation
- R(g);CHECK,P_SPINR(g),XB(F)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- B(e);P_PINP(G)::QAR1(B)
- Refutation
- R(g);CHECK,P_SPINR(g),XB(F)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- B(e);P_PINP(G)::QAR1(B)
- Refutation
- R(g);CHECK,P_SPINR(g),XB(F)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- B(e);P_PINP(G)::QAR1(B)
- Refutation
- R(g);CHECK,P_SPINR(g),XB(F)
- Try
- B(A);
- Threat
- QAR1(B)
- Vars
- R(g);CHECK,OGATE,P_SPINR(g),XB(F)::R1(H),XR(g)
- B(a);N_GUARD::QAB1(B),XB(a)
- B(e);N_PINB(F)::R(H)+B(F)
- P(i);N_PINB(F)::R(H)+B(F)
- Refutation
- R(g);
- Try
- Q(B);CHECK
- Vars
- K(d);N_GUARD,S_FLIGHT,XS(D)::QAB1(B)
- Refutation
- K(d);N_PINB(F),S_FLIGHT
- Try
- Actual
- B(A);
- Threat
- QAR1(B)
- Vars
- R(g);CHECK,OGATE,P_SPINR(g),XB(F)::R1(H),XR(g)
- B(a);SBLOCK::B(A)+S(D),DCHECK
- R(g);SBLOCK::QAR2(B)
- B(e);N_PINB(F)::R(H)+B(F)
- P(i);N_PINB(F)::R(H)+B(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).