MESON Chess Problem Database
Problem Display
PID: 138600 (8/r4p1q/6Qn/2N2r2/pB6/8/Ppk2N1R/1b2RK2 w - - 0 1)
Ellerman, Arnoldo
El Ajedrez Americano, 1931
#2
8 + 9
SOLUTION
- SOUND
- Tries
- 1.Qxf5+?
- 1...Sxf5
- 2.Sh3#
- 1...Qxf5!
- 1...Sxf5
- 1.Qg3?
- threat
- 2.Qc3#
- 2.Qd3#
- 1...Rxf2+
- 2.Rxf2#
- 2.Qxf2#
- 1...Rxc5
- 2.Sh1#
- 2.Sd3#
- 2.Sh3#
- 2.Se4#
- 2.Sg4#
- 1...Rd7
- 2.Qc3#
- 1...Qg7
- 2.Qd3#
- 1...Qh8
- 2.Qd3#
- 1...Rf4
- 2.Qc3#
- 1...Rd5
- 2.Sfd3#
- 2.Qc3#
- 1...Re5
- 2.Sfe4#
- 2.Qc3#
- 1...Rg5
- 2.Sh1#
- 2.Sfd3#
- 2.Sh3#
- 2.Sfe4#
- 2.Sg4#
- 2.Qc3#
- 1...Rh5
- 2.Sh3#
- 2.Qc3#
- 1...Rf6
- 2.Qc3#
- 1...Rf3!
- threat
- 1.Qa6?
- threat
- 2.Qe2#
- 2.Qd3#
- 2.Qc4#
- 1...Rxf2+
- 2.Rxf2#
- 1...Rxc5
- 2.Sh1#
- 2.Sd3#
- 2.Sh3#
- 2.Se4#
- 2.Sg4#
- 2.Qe2#
- 1...Bxa2
- 2.Qe2#
- 2.Qd3#
- 1...Rd7
- 2.Qc4#
- 2.Qxa4#
- 1...Qg7
- 2.Qe2#
- 2.Qd3#
- 1...Qh8
- 2.Qe2#
- 2.Qd3#
- 1...Rf3
- 2.Qe2#
- 1...Rf4
- 2.Qe2#
- 1...Rd5
- 2.Sfd3#
- 2.Qc4#
- 1...Re5
- 2.Sfe4#
- 2.Qc4#
- 1...Rg5
- 2.Sg4#
- 2.Qe2#
- 2.Qc4#
- 1...Rh5
- 2.Sh3#
- 2.Qe2#
- 2.Qc4#
- 1...Rf6
- 2.Qe2#
- 2.Qc4#
- 1...Re7
- 2.Qd3#
- 2.Qc4#
- 2.Qxa4#
- 1...Rxa6!
- threat
- 1.Qd6?
- threat
- 2.Qd1#
- 2.Qd2#
- 2.Qd3#
- 1...Rxf2+
- 2.Rxf2#
- 1...Rxc5
- 2.Sh1#
- 2.Sd3#
- 2.Sh3#
- 2.Se4#
- 2.Sg4#
- 2.Qxc5#
- 2.Qd1#
- 2.Qd2#
- 1...Rf3
- 2.Qd1#
- 2.Qd2#
- 1...Rf4
- 2.Qd1#
- 2.Qd2#
- 1...Rd5
- 2.Sfd3#
- 1...Re5
- 2.Sfe4#
- 2.Qd1#
- 2.Qd2#
- 1...Rg5
- 2.Sg4#
- 2.Qd1#
- 2.Qd2#
- 1...Rh5
- 2.Sh3#
- 2.Qd1#
- 2.Qd2#
- 1...Rf6
- 2.Qd1#
- 2.Qd2#
- 1...Rd7!
- threat
- 1.Qe6?
- threat
- 2.Qc4#
- 2.Qe2#
- 2.Qe4#
- 1...Rxf2+
- 2.Rxf2#
- 1...Rxc5
- 2.Qe2#
- 1...Bxa2
- 2.Qe2#
- 2.Qe4#
- 1...Rd7
- 2.Qc4#
- 1...Qg7
- 2.Qe2#
- 2.Qe4#
- 1...Qh8
- 2.Qe2#
- 2.Qe4#
- 1...Rf3
- 2.Qe2#
- 1...Rf4
- 2.Qe2#
- 1...Rd5
- 2.Sfd3#
- 1...Re5
- 2.Sfe4#
- 2.Qc4#
- 1...Rg5
- 2.Sg4#
- 2.Qc4#
- 2.Qe2#
- 1...Rh5
- 2.Sh3#
- 2.Qc4#
- 2.Qe2#
- 1...Rf6
- 2.Qc4#
- 2.Qe2#
- 1...Re7
- 2.Qc4#
- 1...fxe6!
- threat
- 1.Qxf5+?
- Keys
- 1.Qc6!
- threat
- 2.Qe4#
- 1...Rxf2+
- 2.Rxf2#
- 1...Rxc5
- 2.Qxc5#
- 1...Rd7
- 2.Qxa4#
- 1...Rf3
- 2.Sd3#
- 1...Rf4
- 2.Se4#
- 1...Rd5
- 2.Sfd3#
- 1...Re5
- 2.Sfe4#
- 1...Rg5
- 2.Sg4#
- 1...Rh5
- 2.Sh3#
- 1...Rf6
- 2.Se6#
- 1...Re7
- 2.Qxa4#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 11
- REMOVED MATES = 0
- Sets
- Tries
- Try
- Q(H);CHECK,N_SPINS(D),XR(e)
- Vars
- S(f);XQ(H)::R(E)+S(D)
- Refutation
- Q(i);P_PINS(D),XQ(H)
- Try
- Q(H);N_PINR(e)
- Threat
- DUALS(2)
- Vars
- R(g);::QAR1(H)
- Q(i);::QAB1(H)
- R(e);::QAR1(H)
- Refutation
- R(e);
- Try
- Q(H);N_PINR(e)
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(D)::R(E),XR(e)
- R(e);::QAR2(H)
- Refutation
- R(g);XQ(H)
- Try
- Q(H);N_PINR(e)
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(D)::R(E),XR(e)
- R(e);N_PINS(D)::R(E)+S(D)
- Refutation
- R(g);
- Try
- Q(H);N_PINR(e)
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(D)::R(E),XR(e)
- R(e);N_PINS(D),XS(G)::QAR2(H)
- R(g);::QAR2(H)
- R(e);::QAR2(H)
- R(e);N_PINS(D)::R(E)+S(D)
- Refutation
- P(h);XQ(H)
- Try
- Actual
- Q(H);N_PINR(e)
- Threat
- QAB(H)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(D)::R(E),XR(e)
- R(e);N_PINS(D),OGATE,P_SPINR(e),XS(G)::QAR(H),XR(e)
- R(g);N_GUARD::QAB(H),XP(d)
- R(e);N_GUARD::QAR(H)+S(G)
- R(e);N_PINS(D)::R(E)+S(D)
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