MESON Chess Problem Database

Problem Display
PID: 132736 (r7/2p5/8/1PK5/1N1BPp2/3Q1b2/R1B1q2p/1Nk3bR w - - 0 1)

Morra, Juan Carlos

The Field, 1958

(First published on Thu May 15 1958)

r7/2p5/8/1PK5/1N1BPp2/3Q1b2/R1B1q2p/1Nk3bR

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qd2#
    • 1...Qxd3
      • 2.Sxd3#
    • 1...Qxc2+
      • 2.Qxc2#
    • 1...Qd2
      • 2.Qxd2#
    • 1...Qxe4
      • 2.Qd2#
    • 1...Rxa2
      • 2.Sxa2#
    • 1...Ra3
      • 2.Qxa3#
    • 1...Rb8
      • 2.Qa3#
    • 1...Rc8
      • 2.Qa3#
    • 1...Rd8
      • 2.Qa3#
    • 1...Re8
      • 2.Qa3#
    • 1...Rf8
      • 2.Qa3#
    • 1...Rg8
      • 2.Qa3#
    • 1...Rh8
      • 2.Qa3#
  • Tries
    • 1.Ra3?
      • threat
        • 2.Sa2#
      • 1...Qxc2+
        • 2.Qxc2#
      • 1...Rxa3
        • 2.Qxa3#
      • 1...Qxd3!
    • 1.Rxa8?
      • threat
        • 2.Sa2#
        • 2.Qa3#
      • 1...Qxc2+
        • 2.Qxc2#
      • 1...Qe3
        • 2.Sa2#
      • 1...Qxd3!
    • 1.Qxe2?
      • threat
        • 2.Sd3#
        • 2.Qd2#
      • 1...Bxe4
        • 2.Qd1#
        • 2.Qf1#
        • 2.Qe1#
        • 2.Qd2#
      • 1...Ra3
        • 2.Qd2#
      • 1...Bxe2!
    • 1.Qe3+?
      • 1...Qd2
        • 2.Sd3#
        • 2.Bb2#
        • 2.Qxd2#
      • 1...fxe3
        • 2.Bb2#
      • 1...Qxe3!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Bb2#
      • 1...Qxd3+
        • 2.Sxd3#
      • 1...Qxc2+
        • 2.Qxc2#
      • 1...Qxe4
        • 2.Qd2#
      • 1...Rxa2
        • 2.Sxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD,N_SPINB(b)::QAB1(E)
    • Q(c);XQ(E)::S(F),XQ(c)
    • Q(c);CHECK,OGATE,XB(D)::QAR1(E),XQ(c)
    • Q(c);N_GUARD::QAB1(E),XQ(c)
    • Q(c);N_GUARD,XP(H)::QAB1(E)
    • R(h);XR(C)::S(F),XR(h)
    • R(h);N_GUARD::QAB(E),XR(h)
    • R(h);N_GUARD::QAB(E)
  • Tries
    • Try
      • R(C);
      • Threat
        • S(F)
      • Vars
        • Q(c);CHECK,OGATE,XB(D)::QAR1(E),XQ(c)
        • R(h);OGATE,XR(C)::QAB(E),XR(h)
      • Refutation
        • Q(c);XQ(E)
    • Try
      • R(C);XR(h)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATE,XB(D)::QAR1(E),XQ(c)
        • Q(c);::S(F)
      • Refutation
        • Q(c);XQ(E)
    • Try
      • Q(E);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::QAB1(E)
      • Refutation
        • B(e);XQ(E)
    • Try
      • Q(E);CHECK,N_SPINB(G)
      • Vars
        • P(f);XQ(E)::B(G)
      • Refutation
        • Q(c);P_PINB(G),XQ(E)
  • Actual
    • K(J);N_SPINB(G),P-FLIGHT,P_SPINQ(E)
    • Threat
      • B(G)
    • Vars
      • Q(c);CHECK,XQ(E)::S(F),XQ(c)
      • Q(c);CHECK,N_PINQ(E),XB(D)::QAR1(E),XQ(c)
      • Q(c);N_PINQ(E),P_PINB(G),XP(H)::QAB1(E)
      • R(h);XR(C)::S(F),XR(h)
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