MESON Chess Problem Database

Problem Display
PID: 168426 (3R3K/4p1P1/n1Nbr1B1/1P1kp3/N7/1P2p3/1p1P3Q/n1qR3b w - - 0 1)

Petite, Efren

Problemas, 2015

3R3K/4p1P1/n1Nbr1B1/1P1kp3/N7/1P2p3/1p1P3Q/n1qR3b

#2

11 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.dxc3#
    • 1...Qxc6
      • 2.dxe3#
    • 1...Rf6
      • 2.Qxe5#
    • 1...Rxg6
      • 2.Qxe5#
    • 1...Sc5
      • 2.Sb6#
  • Tries
    • 1.dxe3+?
      • 1...Qd2
        • 2.Rxd2#
        • 2.Qxd2#
      • 1...Qxd1!
    • 1.g8Q?
      • threat
        • 2.Qxe5#
      • 1...Qxc6
        • 2.dxe3#
      • 1...e4
        • 2.Qe5#
        • 2.Qh5#
      • 1...Qc3
        • 2.dxc3#
      • 1...Sxb3!
    • 1.g8B?
      • threat
        • 2.Qxe5#
      • 1...Qxc6
        • 2.dxe3#
      • 1...e4
        • 2.Qe5#
        • 2.Qh5#
      • 1...Qc3
        • 2.dxc3#
      • 1...Sxb3!
  • Keys
    • 1.d4!
      • threat
        • 2.Sb6#
      • 1...Qxc6
        • 2.dxe5#
      • 1...Rxg6
        • 2.Qxe5#
      • 1...exd4
        • 2.Rxd4#
      • 1...Rf6
        • 2.Qxe5#
      • 1...Qc5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);OGATE::R(A)+P(B),XQ(b)
    • Q(b);N_GUARD,XS(G)::R(A)+P(B),XP(e)
    • R(j);N_GUARD::QAR1(C),XP(g)
    • R(j);N_GUARD,XB(H)::QAR1(C),XP(g)
    • S(h);SBLOCK::S(E)
  • Tries
    • Try
      • P(B);CHECK,XP(e)
      • Refutation
        • Q(b);XR(A)
    • Try
      • P(I);P_PINR(j)
      • Threat
        • QAR1(C),XP(g)
      • Vars
        • Q(b);N_GUARD,XS(G)::R(A)+P(B),XP(e)
        • Q(b);OGATE::R(A)+P(B),XQ(b)
      • Refutation
        • S(a);XP(D)
    • Try
      • P(I);P_PINR(j)
      • Threat
        • QAR1(C),XP(g)
      • Vars
        • Q(b);N_GUARD,XS(G)::R(A)+P(B),XP(e)
        • Q(b);OGATE::R(A)+P(B),XQ(b)
      • Refutation
        • S(a);XP(D)
  • Actual
    • P(B);
    • Threat
      • S(E)
    • Vars
      • Q(b);N_GUARD,XS(G)::R(A)+P(B),XP(g)
      • R(j);N_GUARD,XB(H)::QAR1(C),XP(g)
      • P(g);OGATE,P_SPINP(g),XP(B)::R1(A),XP(g)
      • R(j);N_GUARD::QAR1(C),XP(g)
      • Q(b);OGATE::R(A)+P(B),XQ(b)
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