MESON Chess Problem Database

Problem Display
PID: 242304 (8/8/1pRQ1p2/b4pq1/2p1k1B1/2r5/4PRn1/rN1n2K1 w - - 0 1)

Morra, Juan Carlos

Arbejder-Skak, 1953

8/8/1pRQ1p2/b4pq1/2p1k1B1/2r5/4PRn1/rN1n2K1

#2

7 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Bxf5#
    • 1...Re3
      • 2.Rxc4#
    • 1...Sde3
      • 2.Bf3#
    • 1...Sge3
      • 2.Sd2#
  • Tries
    • 1.Bf3+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Rxf3!
    • 1.Bxf5+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Qxf5!
    • 1.Rxc4+?
      • 1...Ke3
        • 2.Qg3#
        • 2.Qe7#
        • 2.Qd2#
        • 2.Qd4#
        • 2.Qe6#
      • 1...Rxc4!
    • 1.Qd5+?
      • 1...Ke3
        • 2.Re6#
      • 1...Kxd5!
  • Keys
    • 1.e3!
      • threat
        • 2.Qd4#
      • 1...Kxe3
        • 2.Re2#
      • 1...Qxe3
        • 2.Bxf5#
      • 1...Rxe3
        • 2.Rxc4#
      • 1...Sdxe3
        • 2.Bf3#
      • 1...Sgxe3
        • 2.Sd2#
      • 1...Rd3
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(i);N_GUARD,P_PINR(D),SBLOCK::B(E),XP(h)
    • R(d);N_GUARD,SBLOCK::R(F),XP(e)
    • S(b);P_PINS(A),SBLOCK,S_CUTR(d)::B(E)
    • S(c);P_PINB(E),SBLOCK,S_CUTQ(i)::S(A)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(f);P-FLIGHT::QAB1(G)
      • Refutation
        • R(d);XB(E)
    • Try
      • B(E);CHECK,XP(h)
      • Vars
        • K(f);P-FLIGHT::QAB1(G)
      • Refutation
        • Q(i);XB(E)
    • Try
      • R(F);CHECK,XP(e)
      • Refutation
        • R(d);XR(F)
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);P-FLIGHT::R(F)
      • Refutation
        • K(f);S_FLIGHT,XQ(G)
  • Actual
    • P(C);
    • Threat
      • QAR1(G)
    • Vars
      • K(f);OGATEB,P-FLIGHT,XP(C)::R1(D)
      • Q(i);N_GUARD,P_PINR(D),SBLOCK,XP(C)::B(E),XP(h)
      • R(d);N_GUARD,SBLOCK,XP(C)::R(F),XP(e)
      • S(b);P_PINS(A),SBLOCK,XP(C)::B(E)
      • S(c);P_PINB(E),SBLOCK,XP(C)::S(A)
      • R(d);SBLOCK::QAR2(G)
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